diff --git a/dlls/ktmw32/ktmw32.spec b/dlls/ktmw32/ktmw32.spec
index cda7bbdcb8a..0d549bf3929 100644
--- a/dlls/ktmw32/ktmw32.spec
+++ b/dlls/ktmw32/ktmw32.spec
@@ -1,6 +1,6 @@
 @ stub CommitComplete
 @ stub CommitEnlistment
-@ stub CommitTransaction
+@ stdcall CommitTransaction(ptr)
 @ stub CommitTransactionAsync
 @ stub CreateEnlistment
 @ stub CreateResourceManager
diff --git a/dlls/ktmw32/ktmw32_main.c b/dlls/ktmw32/ktmw32_main.c
index 0650b09b4af..6aee549caa0 100644
--- a/dlls/ktmw32/ktmw32_main.c
+++ b/dlls/ktmw32/ktmw32_main.c
@@ -43,6 +43,15 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
     return TRUE;
 }
 
+/***********************************************************************
+ * CommitTransaction (ktmw32.@)
+ */
+BOOL WINAPI CommitTransaction(HANDLE transaction)
+{
+    FIXME("(%p): stub\n", transaction);
+    return TRUE;
+}
+
 /***********************************************************************
  * CreateTransaction (ktmw32.@)
  */