diff --git a/dmd/root.c b/dmd/root.c
index 4e7661755f..79ae32d1ee 100644
--- a/dmd/root.c
+++ b/dmd/root.c
@@ -519,7 +519,6 @@ char *FileName::ext(const char *str)
 #if _WIN32
 	    case '\\':
 	    case ':':
-	    case '/':
 		break;
 #endif
 	    default: