diff --git a/c_check b/c_check
index 0fdadb659..d694e7411 100644
--- a/c_check
+++ b/c_check
@@ -30,7 +30,7 @@ if ($ARGV[0] =~ /(.*)(-[.\d]+)/) {
 	$cross_suffix = $1;
     }
 } else {
-    if ($ARGV[0] =~ /(.*-)(.*)/) {
+    if ($ARGV[0] =~ /([^\/]*-)([^\/]*$)/) {
 	$cross_suffix = $1;
     }
 }