diff --git a/external/lib/heap/dlmalloc/dlmalloc.c b/external/lib/heap/dlmalloc/dlmalloc.c
index 96a26c68..a6dc2348 100644
--- a/external/lib/heap/dlmalloc/dlmalloc.c
+++ b/external/lib/heap/dlmalloc/dlmalloc.c
@@ -5425,7 +5425,7 @@ struct mallinfo dlmallinfo(void) {
 #endif /* NO_MALLINFO */
 
 #if !NO_MALLOC_STATS
-void dlmalloc_stats() {
+void dlmalloc_stats(void) {
   internal_malloc_stats(gm);
 }
 #endif /* NO_MALLOC_STATS */