diff --git a/HACKING b/HACKING
index 473500aa5c..2bc008eae9 100644
--- a/HACKING
+++ b/HACKING
@@ -246,4 +246,4 @@ have done little to try to remove those warnings.
 If you do not have Flex installed, it can be downloaded from the
 following URL:
 
-   http://flex.sourceforge.net/
+    https://github.com/westes/flex
diff --git a/ompi/mca/io/romio321/romio/adio/common/onesided_aggregation.c b/ompi/mca/io/romio321/romio/adio/common/onesided_aggregation.c
index 3e0ad1f8fc..71a5b7bee6 100644
--- a/ompi/mca/io/romio321/romio/adio/common/onesided_aggregation.c
+++ b/ompi/mca/io/romio321/romio/adio/common/onesided_aggregation.c
@@ -1966,7 +1966,7 @@ printf("iAmUsedAgg - currentRoundFDStart initialized "
       int *sourceAggBlockLengths=NULL;
       MPI_Aint *sourceAggDisplacements=NULL, *recvBufferDisplacements=NULL;
       MPI_Datatype *sourceAggDataTypes=NULL;
-      char *derivedTypePackedSourceBuffer;
+      char *derivedTypePackedSourceBuffer=NULL;
       int derivedTypePackedSourceBufferOffset = 0;
       int allocatedDerivedTypeArrays = 0;
       ADIO_Offset amountOfDataReadThisRoundAgg = 0;