diff --git a/src/doors/smurfcombat/mdel.c b/src/doors/smurfcombat/mdel.c
index 58b0157b5aeb438f02229d4edb0ecdeb65f2bfc6..eeeb3671a7be4b9e1209d79b45945bf1c71ac9a6 100644
--- a/src/doors/smurfcombat/mdel.c
+++ b/src/doors/smurfcombat/mdel.c
@@ -1,4 +1,5 @@
 #include <dirwrap.h>
+#include <string.h>
 
 int mdel(char *glob)
 {