diff --git a/orte/dss/dss_peek.c b/orte/dss/dss_peek.c
index 2f401d324a..fc5814ffe8 100644
--- a/orte/dss/dss_peek.c
+++ b/orte/dss/dss_peek.c
@@ -80,7 +80,6 @@ int orte_dss_peek_type(orte_buffer_t *buffer, orte_data_type_t *type)
 {
     int ret;
     orte_buffer_t tmp;
-    size_t n=1;
 
     /* check for errors */
     if (buffer == NULL) {
diff --git a/orte/dss/dss_release.c b/orte/dss/dss_release.c
index 64840a46a9..1bce53b635 100644
--- a/orte/dss/dss_release.c
+++ b/orte/dss/dss_release.c
@@ -28,7 +28,6 @@
 
 void orte_dss_release(orte_data_value_t *value)
 {
-    int rc;
     orte_dss_type_info_t *info;
 
     /* check for error */
@@ -45,8 +44,6 @@ void orte_dss_release(orte_data_value_t *value)
     }
 
     info->odti_release_fn(value);
-
-    return;
 }
 
 /*
diff --git a/orte/mca/gpr/null/gpr_null.c b/orte/mca/gpr/null/gpr_null.c
index 9cac5f71c0..65b008d60e 100644
--- a/orte/mca/gpr/null/gpr_null.c
+++ b/orte/mca/gpr/null/gpr_null.c
@@ -271,7 +271,7 @@ orte_gpr_null_decrement_value(orte_gpr_value_t * value)
 
 static int orte_gpr_null_put_1(orte_gpr_addr_mode_t addr_mode,
                                char *segment, char **tokens,
-                               char *key, orte_data_value_t value)
+                               char *key, orte_data_value_t* value)
 {
     return ORTE_SUCCESS;
 }
@@ -280,7 +280,7 @@ static int orte_gpr_null_put_1(orte_gpr_addr_mode_t addr_mode,
 static int orte_gpr_null_put_N(orte_gpr_addr_mode_t addr_mode,
                                char *segment, char **tokens,
                                size_t n, char **keys,
-                               orte_data_value_t *data_values)
+                               orte_data_value_t **data_values)
 {
     return ORTE_SUCCESS;
 }
diff --git a/orte/mca/rmgr/base/data_type_support/rmgr_data_type_size_fns.c b/orte/mca/rmgr/base/data_type_support/rmgr_data_type_size_fns.c
index 4b6a351964..12773d3d8d 100755
--- a/orte/mca/rmgr/base/data_type_support/rmgr_data_type_size_fns.c
+++ b/orte/mca/rmgr/base/data_type_support/rmgr_data_type_size_fns.c
@@ -60,7 +60,7 @@ int orte_rmgr_base_size_app_context(size_t *size, orte_app_context_t *src, orte_
     if (0 < count) {
         /* account for array of char* */
         *size += count * sizeof(char*);
-        for (i=0; i < count; i++) {
+        for (i=0; i < (size_t)count; i++) {
             *size += strlen(src->env[i]);
         }
     }
diff --git a/orte/mca/rmgr/base/data_type_support/rmgr_data_type_unpacking_fns.c b/orte/mca/rmgr/base/data_type_support/rmgr_data_type_unpacking_fns.c
index c3df50405c..b09c324802 100644
--- a/orte/mca/rmgr/base/data_type_support/rmgr_data_type_unpacking_fns.c
+++ b/orte/mca/rmgr/base/data_type_support/rmgr_data_type_unpacking_fns.c
@@ -38,7 +38,7 @@ int orte_rmgr_base_unpack_app_context(orte_buffer_t *buffer, void *dest,
 {
     int rc, count;
     orte_app_context_t **app_context;
-    size_t i, max_n=1, temp;
+    size_t i, max_n=1;
     int8_t have_prefix;
 
     /* unpack into array of app_context objects */
diff --git a/orte/mca/soh/base/soh_base_set_proc_soh.c b/orte/mca/soh/base/soh_base_set_proc_soh.c
index f984847471..760f9e6e2b 100644
--- a/orte/mca/soh/base/soh_base_set_proc_soh.c
+++ b/orte/mca/soh/base/soh_base_set_proc_soh.c
@@ -38,12 +38,10 @@ int orte_soh_base_set_proc_soh(orte_process_name_t *proc,
                                int exit_status)
 {
     orte_gpr_value_t *value;
-    orte_data_value_t *dv;
     int rc;
     orte_jobid_t jobid;
     orte_vpid_t vpid;
     orte_exit_code_t exit_code;
-    size_t i;
     char *segment;
 
     if (ORTE_SUCCESS != (rc = orte_ns.get_jobid(&jobid, proc))) {
diff --git a/orte/util/error_strings.c b/orte/util/error_strings.c
index e305ef3bdb..2d9f8113e0 100644
--- a/orte/util/error_strings.c
+++ b/orte/util/error_strings.c
@@ -21,6 +21,7 @@
 #include "orte_config.h"
 
 #include "orte/include/orte_constants.h"
+#include <stdio.h>
 
 const char *
 orte_err2str(int errnum)