diff --git a/cmake/build_helpers.cmake b/cmake/build_helpers.cmake
index 25d9abe64..6cf73cb2f 100644
--- a/cmake/build_helpers.cmake
+++ b/cmake/build_helpers.cmake
@@ -60,13 +60,16 @@ macro(addDefines)
     set(IMHEX_VERSION_STRING ${IMHEX_VERSION})
     if (CMAKE_BUILD_TYPE STREQUAL "Release")
         set(IMHEX_VERSION_STRING ${IMHEX_VERSION_STRING})
+        add_compile_definitions(NDEBUG)
     elseif (CMAKE_BUILD_TYPE STREQUAL "Debug")
         set(IMHEX_VERSION_STRING ${IMHEX_VERSION_STRING}-Debug)
         add_compile_definitions(DEBUG _GLIBCXX_DEBUG _GLIBCXX_VERBOSE)
     elseif (CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
         set(IMHEX_VERSION_STRING ${IMHEX_VERSION_STRING}-RelWithDebInfo)
+        add_compile_definitions(NDEBUG)
     elseif (CMAKE_BUILD_TYPE STREQUAL "MinSizeRel")
         set(IMHEX_VERSION_STRING ${IMHEX_VERSION_STRING}-MinSizeRel)
+        add_compile_definitions(NDEBUG)
     endif ()
 
     add_compile_definitions(IMHEX_VERSION="${IMHEX_VERSION_STRING}")