--- a/compats.c
+++ b/compats.c
@@ -508,7 +508,7 @@
  * Indirect memset through a volatile pointer to hopefully avoid
  * dead-store optimisation eliminating the call.
  */
-static void (* volatile ssh_memset)(void *, int, size_t) = memset;
+static void * (* volatile ssh_memset)(void *, int, size_t) = memset;
 
 void
 explicit_bzero(void *p, size_t n)