diff --git a/rostests/apitests/ntdll/RtlDosSearchPath_U.c b/rostests/apitests/ntdll/RtlDosSearchPath_U.c
index 77117d5745e..b807ce46e23 100644
--- a/rostests/apitests/ntdll/RtlDosSearchPath_U.c
+++ b/rostests/apitests/ntdll/RtlDosSearchPath_U.c
@@ -101,7 +101,7 @@ CheckBuffer(
 START_TEST(RtlDosSearchPath_U)
 {
     NTSTATUS ExceptionStatus;
-    ULONG Length;
+    ULONG Length = 0;
     WCHAR Buffer[MAX_PATH];
     PWSTR PartName;
     BOOLEAN Okay;