diff --git a/slang_backend.cpp b/slang_backend.cpp
index b9999d5..5ff90b9 100644
--- a/slang_backend.cpp
+++ b/slang_backend.cpp
@@ -359,6 +359,7 @@
 void Backend::AnnotateFunction(clang::FunctionDecl *FD) {
   if (FD &&
       FD->hasBody() &&
+      !FD->isImplicit() &&
       !Slang::IsLocInRSHeaderFile(FD->getLocation(), mSourceMgr)) {
     mRefCount.Init();
     mRefCount.SetDeclContext(FD);
@@ -426,7 +427,7 @@
     }
 
     if (getTargetAPI() >= SLANG_FEATURE_SINGLE_SOURCE_API) {
-      if (FD && FD->hasBody() &&
+      if (FD && FD->hasBody() && !FD->isImplicit() &&
           !Slang::IsLocInRSHeaderFile(FD->getLocation(), mSourceMgr)) {
         if (FD->hasAttr<clang::RenderScriptKernelAttr>()) {
           // Log functions with attribute "kernel" by their names, and assign
diff --git a/slang_rs_object_ref_count.cpp b/slang_rs_object_ref_count.cpp
index a52db88..2688ddc 100644
--- a/slang_rs_object_ref_count.cpp
+++ b/slang_rs_object_ref_count.cpp
@@ -1642,6 +1642,8 @@
   clang::CompoundStmt *CS = BuildCompoundStmt(mCtx, StmtList, loc);
 
   FD->setBody(CS);
+  // We need some way to tell if this FD is generated by slang
+  FD->setImplicit();
 
   return FD;
 }