diff --git a/src/coreclr/tools/Common/TypeSystem/IL/Stubs/InterlockedIntrinsics.cs b/src/coreclr/tools/Common/TypeSystem/IL/Stubs/InterlockedIntrinsics.cs
index 20e33b642fc15f..70092316218fcd 100644
--- a/src/coreclr/tools/Common/TypeSystem/IL/Stubs/InterlockedIntrinsics.cs
+++ b/src/coreclr/tools/Common/TypeSystem/IL/Stubs/InterlockedIntrinsics.cs
@@ -38,7 +38,7 @@ public static MethodIL EmitIL(
                     {
                         ceArgType = method.Context.GetWellKnownType(WellKnownType.Object);
                     }
-                    else if ((tType.IsPrimitive || tType.IsEnum) && (tType.UnderlyingType.Category is not (TypeFlags.Single or TypeFlags.Double)))
+                    else if (tType.IsPrimitive || tType.IsEnum)
                     {
                         int size = tType.GetElementSize().AsInt;
                         Debug.Assert(size is 1 or 2 or 4 or 8);
@@ -46,7 +46,9 @@ public static MethodIL EmitIL(
                         {
                             1 => method.Context.GetWellKnownType(WellKnownType.Byte),
                             2 => method.Context.GetWellKnownType(WellKnownType.UInt16),
+                            4 when tType.UnderlyingType.Category is TypeFlags.Single => method.Context.GetWellKnownType(WellKnownType.Single),
                             4 => method.Context.GetWellKnownType(WellKnownType.Int32),
+                            _ when tType.UnderlyingType.Category is TypeFlags.Double => method.Context.GetWellKnownType(WellKnownType.Double),
                             _ => method.Context.GetWellKnownType(WellKnownType.Int64),
                         };
                     }