diff --git a/src/util.c b/src/util.c
index 149af2da..f17bd6e1 100644
--- a/src/util.c
+++ b/src/util.c
@@ -148,7 +148,7 @@ void start_application(const char *command) {
                                         shell = "/bin/sh";
 
                         /* This is the child */
-                        execl(shell, shell, "-c", command, NULL);
+                        execl(shell, shell, "-c", command, (void*)NULL);
                         /* not reached */
                 }
                 exit(0);