diff --git a/ompi/mca/fcoll/dynamic/fcoll_dynamic_file_write_all.c b/ompi/mca/fcoll/dynamic/fcoll_dynamic_file_write_all.c
index d098971dd4..931e1d050f 100644
--- a/ompi/mca/fcoll/dynamic/fcoll_dynamic_file_write_all.c
+++ b/ompi/mca/fcoll/dynamic/fcoll_dynamic_file_write_all.c
@@ -41,9 +41,9 @@ typedef struct local_io_array{
 
 
 
-int local_heap_sort (local_io_array *io_array,
-		     int num_entries,
-		     int *sorted);
+static int local_heap_sort (local_io_array *io_array,
+			    int num_entries,
+			    int *sorted);
 
 
 int
@@ -1105,9 +1105,9 @@ mca_fcoll_dynamic_file_write_all (mca_io_ompio_file_t *fh,
 }
 
 
-int local_heap_sort (local_io_array *io_array,
-		     int num_entries,
-		     int *sorted)
+static int local_heap_sort (local_io_array *io_array,
+			    int num_entries,
+			    int *sorted)
 {
     int i = 0;
     int j = 0;
diff --git a/ompi/mca/fcoll/static/fcoll_static_file_write_all.c b/ompi/mca/fcoll/static/fcoll_static_file_write_all.c
index 12c7bdb010..dcf96cfcc8 100644
--- a/ompi/mca/fcoll/static/fcoll_static_file_write_all.c
+++ b/ompi/mca/fcoll/static/fcoll_static_file_write_all.c
@@ -40,9 +40,9 @@ typedef struct local_io_array{
 
 
 
-int local_heap_sort (local_io_array *io_array,
-		     int num_entries,
-		     int *sorted);
+static int local_heap_sort (local_io_array *io_array,
+			    int num_entries,
+			    int *sorted);
 
 int find_next_index( int proc_index,
 		     int c_index,
@@ -923,9 +923,9 @@ mca_fcoll_static_file_write_all (mca_io_ompio_file_t *fh,
 
 
 
-int local_heap_sort (local_io_array *io_array,
-		     int num_entries,
-		     int *sorted)
+static int local_heap_sort (local_io_array *io_array,
+			    int num_entries,
+			    int *sorted)
 {
     int i = 0;
     int j = 0;