diff --git a/.clang-tidy b/.clang-tidy
index 215b5a5e26..f3381a7b75 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -2,6 +2,7 @@ Checks: [-*,
          bugprone-*,
          performance-avoid-endl,
          performance-enum-size,
+         performance-faster-string-find,
 
          # Skipping these temporarily because they are very noisy
          -bugprone-narrowing-conversions,
diff --git a/src/script_opt/CPP/Vars.cc b/src/script_opt/CPP/Vars.cc
index 893a1231a0..62888c6ee1 100644
--- a/src/script_opt/CPP/Vars.cc
+++ b/src/script_opt/CPP/Vars.cc
@@ -158,7 +158,7 @@ string CPPCompile::CaptureName(const ID* c) const {
     // We want to strip both the module and any inlining appendage.
     auto tn = trim_name(c);
 
-    auto appendage = tn.find(".");
+    auto appendage = tn.find('.');
     if ( appendage != string::npos )
         tn.erase(tn.begin() + appendage, tn.end());