1 files changed, 3 insertions, 1 deletions
diff --git a/source/slang/slang.cpp b/source/slang/slang.cpp
index 8c6bf403e..c48701575 100644
--- a/source/slang/slang.cpp
+++ b/source/slang/slang.cpp
@@ -2832,7 +2832,9 @@ SLANG_NO_THROW SlangResult SLANG_MCALL ComponentType::specialize(
     auto specializationParamCount = getSpecializationParamCount();
     if( specializationArgCount != specializationParamCount )
     {
-        // TODO: diagnose
+        sink.diagnose(SourceLoc(), Diagnostics::mismatchSpecializationArguments,
+            specializationParamCount,
+            specializationArgCount);
         sink.getBlobIfNeeded(outDiagnostics);
         return SLANG_FAIL;
     }