diff --git a/CMakeLists.txt b/CMakeLists.txt
index fb1f6f85b9..bdcef544c8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -94,6 +94,8 @@ INCLUDE (find_flex)
 FIND_FLEX()
 
 ADD_SUBDIRECTORY(opal)
+# set up the libevent include dirs
+INCLUDE_DIRECTORIES (${LIBEVENT_INCLUDE_DIRS})
 ADD_SUBDIRECTORY(ompi)
 ADD_SUBDIRECTORY(orte)
 
diff --git a/contrib/platform/win32/CMakeModules/opal_event_config.cmake b/contrib/platform/win32/CMakeModules/opal_event_config.cmake
index 9c572c6acc..104b5a5caa 100644
--- a/contrib/platform/win32/CMakeModules/opal_event_config.cmake
+++ b/contrib/platform/win32/CMakeModules/opal_event_config.cmake
@@ -7,58 +7,85 @@
 # $HEADER$
 #
 
-MESSAGE(STATUS "configure libevent.")
+# Only one libevent component should be used, selection is done by editing .windows in_use property.
 
-# set up event include directories.
-INCLUDE_DIRECTORIES ("${CURRENT_PATH}/libevent/compat"
-  "${CURRENT_PATH}/libevent/WIN32-Code/"
-  "${CURRENT_PATH}/libevent/include/"
-  "${CURRENT_PATH}/libevent"
-  "${PROJECT_BINARY_DIR}/mca/event/libevent207/libevent/include/")
+FILE(STRINGS ${CURRENT_PATH}/.windows IN_USE REGEX "^in_use=")
 
-IF(WIN32)
+IF(IN_USE STREQUAL "0")
 
-# generating config.h
-# windows doesn't need this file, just make an empty one
-FILE(WRITE ${PROJECT_BINARY_DIR}/mca/event/libevent207/libevent/include/config.h
-    " /* config.h.  Generated automatically by CMake. */ ")
+  SET(RESULT FALSE)
 
-  SET(RESULT_SOURCE_FILES
-    ${RESULT_SOURCE_FILES}
-    ${CURRENT_PATH}/libevent207_component.c
-    ${CURRENT_PATH}/libevent207_module.c
-    #system sources
-    ${CURRENT_PATH}/libevent/win32select.c
-    ${CURRENT_PATH}/libevent/evthread_win32.c
-    ${CURRENT_PATH}/libevent/buffer_iocp.c
-    ${CURRENT_PATH}/libevent/event_iocp.c
-    ${CURRENT_PATH}/libevent/bufferevent_async.c
-    #core sources
-    ${CURRENT_PATH}/libevent/event.c
-    ${CURRENT_PATH}/libevent/evthread.c
-    ${CURRENT_PATH}/libevent/buffer.c
-    ${CURRENT_PATH}/libevent/bufferevent.c
-    ${CURRENT_PATH}/libevent/bufferevent_sock.c
-    ${CURRENT_PATH}/libevent/bufferevent_filter.c
-    ${CURRENT_PATH}/libevent/bufferevent_pair.c
-    ${CURRENT_PATH}/libevent/listener.c
-    ${CURRENT_PATH}/libevent/bufferevent_ratelim.c
-	${CURRENT_PATH}/libevent/evmap.c
-    ${CURRENT_PATH}/libevent/log.c
-    ${CURRENT_PATH}/libevent/evutil.c
-    ${CURRENT_PATH}/libevent/evutil_rand.c
-    ${CURRENT_PATH}/libevent/strlcpy.c
-    ${CURRENT_PATH}/libevent/signal.c
-    ${CURRENT_PATH}/libevent/event_tagging.c
-  )
+ELSE(IN_USE STREQUAL "0")
 
-  OMPI_DEF(OPAL_HAVE_WORKING_EVENTOPS 1 
-    "Whether our event component has working event operations or not if not, then assumedly it only has working timers and signals)." 0 1)
+  IF(LIBEVENT_CONFIG_DONE)
+    MESSAGE(STATUS "multiple libevent selected, only one is configured.")
+    SET(RESULT FALSE)
 
-ELSE(WIN32)
-  SET(RESULT_SOURCE_FILES
-    ${RESULT_SOURCE_FILES}
-  )
-ENDIF(WIN32)
+  ELSE(LIBEVENT_CONFIG_DONE)
+    SET(LIBEVENT_FOUND TRUE CACHE INTERNAL "allow only one event mca.")
 
-SET(RESULT TRUE)
\ No newline at end of file
+    MESSAGE(STATUS "configure libevent.")
+
+    # set up event include directories.
+    INCLUDE_DIRECTORIES ("${CURRENT_PATH}/libevent/compat"
+      "${CURRENT_PATH}/libevent/WIN32-Code/"
+      "${CURRENT_PATH}/libevent/include/"
+      "${CURRENT_PATH}/libevent"
+      "${PROJECT_BINARY_DIR}/mca/event/libevent207/libevent/include/")
+
+    SET(LIBEVENT_INCLUDE_DIRS ${CURRENT_PATH}/libevent/compat;${CURRENT_PATH}/libevent/WIN32-Code/;${CURRENT_PATH}/libevent/include/;${CURRENT_PATH}/libevent;${PROJECT_BINARY_DIR}/mca/event/libevent207/libevent/include/
+    CACHE INTERNAL "the libevent dirs that have to be included on the top level.")
+      
+    IF(WIN32)
+
+      # generating config.h
+      # windows doesn't need this file, just make an empty one
+      FILE(WRITE ${PROJECT_BINARY_DIR}/mca/event/libevent207/libevent/include/config.h
+        " /* config.h.  Generated automatically by CMake. */ ")
+
+      SET(RESULT_SOURCE_FILES
+        ${RESULT_SOURCE_FILES}
+        ${CURRENT_PATH}/libevent207_component.c
+        ${CURRENT_PATH}/libevent207_module.c
+        #system sources
+        ${CURRENT_PATH}/libevent/win32select.c
+        ${CURRENT_PATH}/libevent/evthread_win32.c
+        ${CURRENT_PATH}/libevent/buffer_iocp.c
+        ${CURRENT_PATH}/libevent/event_iocp.c
+        ${CURRENT_PATH}/libevent/bufferevent_async.c
+        #core sources
+        ${CURRENT_PATH}/libevent/event.c
+        ${CURRENT_PATH}/libevent/evthread.c
+        ${CURRENT_PATH}/libevent/buffer.c
+        ${CURRENT_PATH}/libevent/bufferevent.c
+        ${CURRENT_PATH}/libevent/bufferevent_sock.c
+        ${CURRENT_PATH}/libevent/bufferevent_filter.c
+        ${CURRENT_PATH}/libevent/bufferevent_pair.c
+        ${CURRENT_PATH}/libevent/listener.c
+        ${CURRENT_PATH}/libevent/bufferevent_ratelim.c
+	    ${CURRENT_PATH}/libevent/evmap.c
+        ${CURRENT_PATH}/libevent/log.c
+        ${CURRENT_PATH}/libevent/evutil.c
+        ${CURRENT_PATH}/libevent/evutil_rand.c
+        ${CURRENT_PATH}/libevent/strlcpy.c
+        ${CURRENT_PATH}/libevent/signal.c
+        ${CURRENT_PATH}/libevent/event_tagging.c
+      )
+
+      OMPI_DEF(OPAL_HAVE_WORKING_EVENTOPS 1 
+        "Whether our event component has working event operations or not if not, then assumedly it only has working timers and signals)." 0 1)
+
+      OMPI_DEF(MCA_event_IMPLEMENTATION_HEADER "${CURRENT_PATH}/libevent207.h"
+        "Header to include for event implementation" 1 1)
+
+    ELSE(WIN32)
+      SET(RESULT_SOURCE_FILES
+        ${RESULT_SOURCE_FILES}
+      )
+    ENDIF(WIN32)
+
+  SET(RESULT TRUE)
+
+  ENDIF(LIBEVENT_CONFIG_DONE)
+
+ENDIF(IN_USE STREQUAL "0")
\ No newline at end of file
diff --git a/opal/mca/event/libevent207/.windows b/opal/mca/event/libevent207/.windows
index 61fba52e8f..4ff95dc143 100644
--- a/opal/mca/event/libevent207/.windows
+++ b/opal/mca/event/libevent207/.windows
@@ -9,5 +9,5 @@
 #
 
 not_single_shared_lib=1
-
+in_use=1
 required_check=opal_event_config
\ No newline at end of file
diff --git a/opal/mca/event/libevent207/libevent/include/event2/event.h b/opal/mca/event/libevent207/libevent/include/event2/event.h
index 5f90e882d3..7e9fed37e1 100644
--- a/opal/mca/event/libevent207/libevent/include/event2/event.h
+++ b/opal/mca/event/libevent207/libevent/include/event2/event.h
@@ -321,7 +321,7 @@ int event_base_set(struct event_base *, struct event *);
     registered.
   @see event_loopexit(), event_base_loop()
   */
-int event_base_loop(struct event_base *, int);
+OPAL_DECLSPEC int event_base_loop(struct event_base *, int);
 
 /**
   Exit the event loop after the specified time (threadsafe variant).
@@ -469,7 +469,7 @@ typedef void (*event_callback_fn)(evutil_socket_t, short, void *);
   @see event_add(), event_del(), event_once()
 
   */
-int event_assign(struct event *, struct event_base *, evutil_socket_t, short, event_callback_fn, void *);
+OPAL_DECLSPEC int event_assign(struct event *, struct event_base *, evutil_socket_t, short, event_callback_fn, void *);
 
 /**
   Create and allocate a new event structure, ready to be added.
@@ -523,7 +523,7 @@ int event_base_once(struct event_base *, evutil_socket_t, short, event_callback_
   @return 0 if successful, or -1 if an error occurred
   @see event_del(), event_set()
   */
-int event_add(struct event *, const struct timeval *);
+OPAL_DECLSPEC int event_add(struct event *, const struct timeval *);
 
 /**
   Remove an event from the set of monitored events.
@@ -536,7 +536,7 @@ int event_add(struct event *, const struct timeval *);
   @return 0 if successful, or -1 if an error occurred
   @see event_add()
  */
-int event_del(struct event *);
+OPAL_DECLSPEC int event_del(struct event *);
 
 
 /**
diff --git a/opal/mca/event/libevent207/libevent207.h b/opal/mca/event/libevent207/libevent207.h
index dcb1b0ed47..63933ba758 100644
--- a/opal/mca/event/libevent207/libevent207.h
+++ b/opal/mca/event/libevent207/libevent207.h
@@ -42,7 +42,9 @@
 #include <string.h>
 #include <assert.h>
 #include <time.h>
+#ifndef WIN32
 #include <stdbool.h>
+#endif
 
 #include "opal/class/opal_object.h"
 #include "opal/threads/mutex.h"
diff --git a/orte/runtime/orte_wait.c b/orte/runtime/orte_wait.c
index bea3eabde1..296201f158 100644
--- a/orte/runtime/orte_wait.c
+++ b/orte/runtime/orte_wait.c
@@ -1121,7 +1121,7 @@ int orte_wait_event(opal_event_t **event, orte_trigger_event_t *trig,
     trig->name = strdup(trigger_name);
     
     /* create the event */
-    *event = OBJ_NEW(opal_event_t);
+    *event =  (opal_event_t *) malloc(sizeof(opal_event_t));
     
     /* setup the trigger and its associated lock */
     OBJ_CONSTRUCT(trig, orte_trigger_event_t);