diff --git a/src/video/aalib/SDL_aavideo.c b/src/video/aalib/SDL_aavideo.c
index b33cb1c46..b2cd24e69 100644
--- a/src/video/aalib/SDL_aavideo.c
+++ b/src/video/aalib/SDL_aavideo.c
@@ -25,6 +25,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>