diff --git a/ompi/mpi/java/c/mpi_Comm.c b/ompi/mpi/java/c/mpi_Comm.c
index 13cabafe46..8166b941cf 100644
--- a/ompi/mpi/java/c/mpi_Comm.c
+++ b/ompi/mpi/java/c/mpi_Comm.c
@@ -180,7 +180,7 @@ static void* getBufCritical(void** bufbase,
                             int baseType, int offset)
 {
     jboolean isCopy ;
-    void* bufptr ;
+    void* bufptr = NULL;
 
     *bufbase = (jbyte*) (*env)->GetPrimitiveArrayCritical(env,buf,&isCopy) ;
 
diff --git a/ompi/mpi/java/c/mpi_Intracomm.c b/ompi/mpi/java/c/mpi_Intracomm.c
index bd65eebb22..f74726054a 100644
--- a/ompi/mpi/java/c/mpi_Intracomm.c
+++ b/ompi/mpi/java/c/mpi_Intracomm.c
@@ -232,7 +232,7 @@ JNIEXPORT void JNICALL Java_mpi_Intracomm_gather(JNIEnv *env, jobject jthis,
         ((*env)->GetLongField(env, recvtype, ompi_java.DatatypehandleID)) ;
 
     int sbaseType = (*env)->GetIntField(env, sendtype, ompi_java.DatatypebaseTypeID) ;
-    int rbaseType ;
+    int rbaseType = -1;
 
     void *sendptr, *recvptr = NULL;
     void *sbufbase, *rbufbase ;
@@ -358,7 +358,7 @@ JNIEXPORT void JNICALL Java_mpi_Intracomm_scatter(JNIEnv *env, jobject jthis,
         (MPI_Datatype)((*env)->GetLongField(env,recvtype,ompi_java.DatatypehandleID)) ;
 
 
-    int sbaseType ;
+    int sbaseType = -1;
     int rbaseType = (*env)->GetIntField(env, recvtype, ompi_java.DatatypebaseTypeID) ;
 
     void *sendptr = NULL, *recvptr ;
@@ -415,7 +415,7 @@ JNIEXPORT void JNICALL Java_mpi_Intracomm_scatterv(JNIEnv *env, jobject jthis,
         (MPI_Datatype)((*env)->GetLongField(env,recvtype,ompi_java.DatatypehandleID)) ;
     MPI_Datatype mpi_stype = mpi_rtype;
 
-    int sbaseType ;
+    int sbaseType = -1;
     int rbaseType = (*env)->GetIntField(env, recvtype, ompi_java.DatatypebaseTypeID) ;
 
     void *sendptr = NULL, *recvptr ;
diff --git a/ompi/mpi/java/c/mpi_Request.c b/ompi/mpi/java/c/mpi_Request.c
index 8cbad6a787..2db2e44871 100644
--- a/ompi/mpi/java/c/mpi_Request.c
+++ b/ompi/mpi/java/c/mpi_Request.c
@@ -271,7 +271,7 @@ JNIEXPORT jobject JNICALL Java_mpi_Request_Waitany(JNIEnv *env, jclass jthis,
     int count=(*env)->GetArrayLength(env,array_of_request);
     MPI_Request *reqs=(MPI_Request*)calloc(count, sizeof(MPI_Request));
 
-    jobject req ;
+    jobject req = NULL;
 
     MPI_Status *status =
         (MPI_Status *)((*env)->GetLongField(env,stat,ompi_java.stathandleID));
@@ -519,7 +519,7 @@ JNIEXPORT jobjectArray JNICALL Java_mpi_Request_waitsome(JNIEnv *env, jclass jth
     int outcount;
 
     jclass status_class = (*env)->FindClass(env,"mpi/Status");
-    jobjectArray array_of_status;
+    jobjectArray array_of_status = NULL;
 
     jmethodID handleConstructorID = 
         (*env)->GetMethodID(env, status_class, "<init>", "()V");
@@ -601,7 +601,7 @@ JNIEXPORT jobjectArray JNICALL Java_mpi_Request_testsome(JNIEnv *env, jclass jth
     int outcount;
 
     jclass status_class = (*env)->FindClass(env,"mpi/Status");
-    jobjectArray array_of_status;
+    jobjectArray array_of_status = NULL;
 
     jmethodID handleConstructorID = 
         (*env)->GetMethodID(env, status_class, "<init>", "()V");