diff --git a/src/crypt/crypt.c b/src/crypt/crypt.c
index 5d0562a..bc9bba5 100644
--- a/src/crypt/crypt.c
+++ b/src/crypt/crypt.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <crypt.h>
 
 int main(int argc, char** argv)
 {