diff --git a/cmake/QtFlagHandlingHelpers.cmake b/cmake/QtFlagHandlingHelpers.cmake
index b65bee2df64..8b2677aa3df 100644
--- a/cmake/QtFlagHandlingHelpers.cmake
+++ b/cmake/QtFlagHandlingHelpers.cmake
@@ -750,7 +750,6 @@ function(qt_internal_set_up_config_optimizations_like_in_qmake)
     qt_internal_get_target_link_types_for_flag_manipulation(target_link_types)
 
     # You can set QT_DEBUG_OPTIMIZATION_FLAGS to see the before and after results.
-    set(QT_DEBUG_OPTIMIZATION_FLAGS TRUE)
     if(QT_DEBUG_OPTIMIZATION_FLAGS)
         message(STATUS "")
         message(STATUS "DEBUG: Original CMake optimization flags.\n")
diff --git a/src/corelib/CMakeLists.txt b/src/corelib/CMakeLists.txt
index 802aa274f59..b6802a6fb54 100644
--- a/src/corelib/CMakeLists.txt
+++ b/src/corelib/CMakeLists.txt
@@ -1333,8 +1333,6 @@ if(NOT QT_FEATURE_system_zlib)
     )
 endif()
 
-qt_internal_print_optimization_flags_values()
 qt_internal_add_optimize_full_flags(IN_CURRENT_SCOPE)
-qt_internal_print_optimization_flags_values()
 
 # special case end
diff --git a/src/gui/CMakeLists.txt b/src/gui/CMakeLists.txt
index 661a887dc8d..4633c6e00ec 100644
--- a/src/gui/CMakeLists.txt
+++ b/src/gui/CMakeLists.txt
@@ -1029,7 +1029,5 @@ qt_internal_add_docs(Gui
 )
 
 # special case begin
-qt_internal_print_optimization_flags_values()
 qt_internal_add_optimize_full_flags(IN_CURRENT_SCOPE)
-qt_internal_print_optimization_flags_values()
 # special case end