diff --git a/opal/mca/crs/base/base.h b/opal/mca/crs/base/base.h
index 20a3a50d5a..c6776c21b9 100644
--- a/opal/mca/crs/base/base.h
+++ b/opal/mca/crs/base/base.h
@@ -93,7 +93,7 @@ extern "C" {
      */
     OPAL_DECLSPEC char * opal_crs_base_state_str(opal_crs_state_type_t state);
 
-    char * opal_crs_base_unique_snapshot_name(pid_t pid);
+    OPAL_DECLSPEC char * opal_crs_base_unique_snapshot_name(pid_t pid);
     OPAL_DECLSPEC char * opal_crs_base_extract_expected_component(char *snapshot_loc, int *prev_pid);
     int    opal_crs_base_init_snapshot_directory(opal_crs_base_snapshot_t *snapshot);
     OAPL_DECLSPEC char * opal_crs_base_get_snapshot_directory(char *uniq_snapshot_name);