diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 857498bc3..aa998190b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -214,7 +214,7 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" STRE
 	target_compile_options(SRB2SDL2 PRIVATE -mno-ms-bitfields)
 endif()
 
-if ("${CMAKE_BUILD_TYPE EQUAL}" NOT STREQUAL "Debug")
+if (${CMAKE_BUILD_TYPE} MATCHES Release OR (${CMAKE_BUILD_TYPE} MATCHES RelWithDebInfo))
 	target_compile_options(SRB2SDL2 PRIVATE -O3)
 endif()