diff --git a/clang/lib/AST/StmtProfile.cpp b/clang/lib/AST/StmtProfile.cpp
index 791c4398fbe9..5a04df04065a 100644
--- a/clang/lib/AST/StmtProfile.cpp
+++ b/clang/lib/AST/StmtProfile.cpp
@@ -622,7 +622,11 @@ void StmtProfiler::VisitDecl(Decl *D) {
       return;
     }
     
-    // FIXME: Template template parameters?
+    if (TemplateTemplateParmDecl *TTP = dyn_cast<TemplateTemplateParmDecl>(D)) {
+      ID.AddInteger(TTP->getDepth());
+      ID.AddInteger(TTP->getIndex());
+      return;
+    }
     
     if (OverloadedFunctionDecl *Ovl = dyn_cast<OverloadedFunctionDecl>(D)) {
       // Canonicalize all of the function declarations within the overload