diff --git a/CMakeLists.txt b/CMakeLists.txt
index e77398947d..87b7f76dd3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -106,6 +106,7 @@ else ()
     ADD_CHECK_CXX_COMPILER_FLAG(CMAKE_CXX_FLAGS CXX_WARN_UNREACHABLE_CODE_BREAK -Wunreachable-code-break)
     ADD_CHECK_CXX_COMPILER_FLAG(CMAKE_CXX_FLAGS CXX_WARN_LOGICAL_OP -Wlogical-op)
     ADD_CHECK_CXX_COMPILER_FLAG(CMAKE_CXX_FLAGS CXX_WARN_RANGE_LOOP_ANALYSIS -Wrange-loop-analysis)
+    ADD_CHECK_CXX_COMPILER_FLAG(CMAKE_CXX_FLAGS CXX_WARN_TAUTOLOGICAL_ZERO_COMPARE -Wtautological-unsigned-zero-compare)
     # Disabled due to problems compiling OpenSSL on macOS.
     # ADD_CHECK_CXX_COMPILER_FLAG(CMAKE_CXX_FLAGS CXX_WARN_DOCUMENTATION -Wdocumentation)
 
diff --git a/src/openrct2/actions/BannerSetNameAction.hpp b/src/openrct2/actions/BannerSetNameAction.hpp
index 2692eed4db..920bb57ac2 100644
--- a/src/openrct2/actions/BannerSetNameAction.hpp
+++ b/src/openrct2/actions/BannerSetNameAction.hpp
@@ -47,7 +47,7 @@ public:
 
     GameActionResult::Ptr Query() const override
     {
-        if (_bannerIndex >= MAX_BANNERS || _bannerIndex < 0)
+        if (_bannerIndex >= MAX_BANNERS)
         {
             log_warning("Invalid game command for setting banner name, banner id = %d", _bannerIndex);
             return MakeResult(GA_ERROR::INVALID_PARAMETERS, STR_NONE);