diff --git a/shadow.c b/shadow.c
index c3e9286..b3f898a 100644
--- a/shadow.c
+++ b/shadow.c
@@ -81,7 +81,7 @@ void run_pw_backend_child(void) {
 			break;
 		}
 
-		char *c = crypt(buf, encpw);
+		const char *c = crypt(buf, encpw);
 		password_buffer_destroy(buf, size);
 		buf = NULL;
 
@@ -100,4 +100,4 @@ void run_pw_backend_child(void) {
 
 	clear_buffer(encpw, strlen(encpw));
 	exit(EXIT_SUCCESS);
-}
\ No newline at end of file
+}