diff --git a/lib/templatesimplifier.cpp b/lib/templatesimplifier.cpp
index f7fa47e01..7fd5b6d39 100644
--- a/lib/templatesimplifier.cpp
+++ b/lib/templatesimplifier.cpp
@@ -521,7 +521,7 @@ unsigned int TemplateSimplifier::templateParameters(const Token *tok)
             return 0;
 
         // inner template
-        if (tok->str() == "<") {
+        if (tok->str() == "<" && tok->previous()->isName()) {
             ++level;
             tok = tok->next();
         }
diff --git a/test/testsimplifytemplate.cpp b/test/testsimplifytemplate.cpp
index 7caafd6c6..8783fec90 100644
--- a/test/testsimplifytemplate.cpp
+++ b/test/testsimplifytemplate.cpp
@@ -5300,6 +5300,7 @@ private:
         ASSERT_EQUALS(3U, templateParameters("template <class T, class... Args, class Tup = std::tuple<Args&...>> constexpr void f() {}")); // #11351
         ASSERT_EQUALS(3U, templateParameters("template <class T, class... Args, class Tup = std::tuple<Args&&...>> void f() {}"));
         ASSERT_EQUALS(3U, templateParameters("template <class T, class... Args, class Tup = std::tuple<Args*...>> void f() {}"));
+        ASSERT_EQUALS(1U, templateParameters("S<4 < sizeof(uintptr_t)> x;"));
     }
 
     // Helper function to unit test TemplateSimplifier::getTemplateNamePosition