diff --git a/src/coreclr/jit/importercalls.cpp b/src/coreclr/jit/importercalls.cpp
index cbc2c89f136ad3..be877b5b1bdee8 100644
--- a/src/coreclr/jit/importercalls.cpp
+++ b/src/coreclr/jit/importercalls.cpp
@@ -6526,9 +6526,7 @@ void Compiler::impCheckForPInvokeCall(
 
     // If we can't get the unmanaged calling convention or the calling convention is unsupported in the JIT,
     // return here without inlining the native call.
-    if (unmanagedCallConv == CorInfoCallConvExtension::Managed ||
-        unmanagedCallConv == CorInfoCallConvExtension::Fastcall ||
-        unmanagedCallConv == CorInfoCallConvExtension::FastcallMemberFunction)
+    if (unmanagedCallConv == CorInfoCallConvExtension::Managed)
     {
         return;
     }
diff --git a/src/coreclr/vm/dllimport.cpp b/src/coreclr/vm/dllimport.cpp
index f070d81f95980a..b24c87f5e38476 100644
--- a/src/coreclr/vm/dllimport.cpp
+++ b/src/coreclr/vm/dllimport.cpp
@@ -4231,9 +4231,7 @@ static void CreateNDirectStubAccessMetadata(
     }
     else
     {
-        if (unmgdCallConv == CorInfoCallConvExtension::Managed ||
-            unmgdCallConv == CorInfoCallConvExtension::Fastcall ||
-            unmgdCallConv == CorInfoCallConvExtension::FastcallMemberFunction)
+        if (unmgdCallConv == CorInfoCallConvExtension::Managed)
         {
             COMPlusThrow(kTypeLoadException, IDS_INVALID_PINVOKE_CALLCONV);
         }