diff --git a/lib/xmalloc.c b/lib/xmalloc.c
index ce1888d8..38fb571a 100644
--- a/lib/xmalloc.c
+++ b/lib/xmalloc.c
@@ -20,6 +20,7 @@
 #endif
 
 #include <sys/types.h>
+#include <stdio.h>
 
 #if STDC_HEADERS
 # include <stdlib.h>