diff --git a/dlls/api-ms-win-core-windowserrorreporting-l1-1-0/api-ms-win-core-windowserrorreporting-l1-1-0.spec b/dlls/api-ms-win-core-windowserrorreporting-l1-1-0/api-ms-win-core-windowserrorreporting-l1-1-0.spec
index 0404830f7b3..8201b14cfb8 100644
--- a/dlls/api-ms-win-core-windowserrorreporting-l1-1-0/api-ms-win-core-windowserrorreporting-l1-1-0.spec
+++ b/dlls/api-ms-win-core-windowserrorreporting-l1-1-0/api-ms-win-core-windowserrorreporting-l1-1-0.spec
@@ -3,7 +3,7 @@
 @ stdcall WerRegisterFile(wstr long long) kernel32.WerRegisterFile
 @ stdcall WerRegisterMemoryBlock(ptr long) kernel32.WerRegisterMemoryBlock
 @ stdcall WerRegisterRuntimeExceptionModule(wstr ptr) kernel32.WerRegisterRuntimeExceptionModule
-@ stub WerUnregisterFile
+@ stdcall WerUnregisterFile(wstr) kernel32.WerUnregisterFile
 @ stdcall WerUnregisterMemoryBlock(ptr) kernel32.WerUnregisterMemoryBlock
 @ stdcall WerUnregisterRuntimeExceptionModule(wstr ptr) kernel32.WerUnregisterRuntimeExceptionModule
 @ stub WerpNotifyLoadStringResource