--- a/fatresize.c
+++ b/fatresize.c
@@ -148,7 +148,7 @@
     char *p;
 
     p = dev+strlen(dev)-1;
-    while (*p && isdigit(*p) && *p != '/')
+    while (*p && *p != '0' && isdigit(*p) && *p != '/')
 	p--;
 
     devname = malloc(p-dev+2);