diff --git a/dlls/api-ms-win-appmodel-runtime-l1-1-2/api-ms-win-appmodel-runtime-l1-1-2.spec b/dlls/api-ms-win-appmodel-runtime-l1-1-2/api-ms-win-appmodel-runtime-l1-1-2.spec
index 8ae7f0b4879..f98ec0e2da2 100644
--- a/dlls/api-ms-win-appmodel-runtime-l1-1-2/api-ms-win-appmodel-runtime-l1-1-2.spec
+++ b/dlls/api-ms-win-appmodel-runtime-l1-1-2/api-ms-win-appmodel-runtime-l1-1-2.spec
@@ -4,7 +4,7 @@
 @ stub AppPolicyGetMediaFoundationCodecLoading
 @ stdcall AppPolicyGetProcessTerminationMethod(ptr ptr) kernelbase.AppPolicyGetProcessTerminationMethod
 @ stub AppPolicyGetShowDeveloperDiagnostic
-@ stub AppPolicyGetThreadInitializationType
+@ stdcall AppPolicyGetThreadInitializationType(ptr ptr) kernelbase.AppPolicyGetThreadInitializationType
 @ stub AppPolicyGetWindowingModel
 @ stub GetApplicationUserModelIdFromToken
 @ stub GetPackageFamilyNameFromToken
diff --git a/dlls/kernelbase/kernelbase.spec b/dlls/kernelbase/kernelbase.spec
index e228497a6ff..85b23237bbc 100644
--- a/dlls/kernelbase/kernelbase.spec
+++ b/dlls/kernelbase/kernelbase.spec
@@ -46,7 +46,7 @@
 # @ stub AppPolicyGetMediaFoundationCodecLoading
 @ stdcall AppPolicyGetProcessTerminationMethod(ptr ptr)
 # @ stub AppPolicyGetShowDeveloperDiagnostic
-# @ stub AppPolicyGetThreadInitializationType
+@ stdcall AppPolicyGetThreadInitializationType(ptr ptr)
 # @ stub AppPolicyGetWindowingModel
 # @ stub AppXFreeMemory
 # @ stub AppXGetApplicationData
diff --git a/dlls/kernelbase/main.c b/dlls/kernelbase/main.c
index c55c2a75ca8..ff1b2f67623 100644
--- a/dlls/kernelbase/main.c
+++ b/dlls/kernelbase/main.c
@@ -36,6 +36,19 @@ LONG WINAPI AppPolicyGetProcessTerminationMethod(HANDLE token, AppPolicyProcessT
     return ERROR_SUCCESS;
 }
 
+/***********************************************************************
+ *          AppPolicyGetThreadInitializationType (KERNELBASE.@)
+ */
+LONG WINAPI AppPolicyGetThreadInitializationType(HANDLE token, AppPolicyThreadInitializationType *policy)
+{
+    FIXME("%p, %p\n", token, policy);
+
+    if(policy)
+        *policy = AppPolicyThreadInitializationType_None;
+
+    return ERROR_SUCCESS;
+}
+
 /***********************************************************************
  *          QuirkIsEnabled3 (KERNELBASE.@)
  */