diff --git a/mkdir.c b/mkdir.c
index 89e9ba5..459cae5 100644
--- a/mkdir.c
+++ b/mkdir.c
@@ -46,7 +46,7 @@ mkdirp(char *path)
 	char *p = path;
 
 	do {
-		if((p = strchr(&p[1], '/')))
+		if(*p && (p = strchr(&p[1], '/')))
 			*p = '\0';
 		if(mkdir(path, S_IRWXU|S_IRWXG|S_IRWXO) == -1 && errno != EEXIST)
 			eprintf("mkdir %s:", path);