1 files changed, 1 insertions, 1 deletions
diff --git a/file.c b/file.c
index af2730a12f..f9f8192637 100644
--- a/file.c
+++ b/file.c
@@ -3500,7 +3500,7 @@ rb_file_s_extname(VALUE klass, VALUE fname)
     if (!p)
 	p = name;
     else
-	name = ++p;
+	do name = ++p; while (isdirsep(*p));
 
     e = 0;
     while (*p && *p == '.') p++;