diff --git a/cmake/Qt3rdPartyLibraryHelpers.cmake b/cmake/Qt3rdPartyLibraryHelpers.cmake
index b4732525e92..7d97d0e46c4 100644
--- a/cmake/Qt3rdPartyLibraryHelpers.cmake
+++ b/cmake/Qt3rdPartyLibraryHelpers.cmake
@@ -227,7 +227,7 @@ function(qt_internal_add_3rdparty_library target)
         qt_autogen_tools_initial_setup(${target})
     endif()
 
-    if(NOT DEFINED arg_EXCEPTIONS)
+    if(NOT arg_EXCEPTIONS)
         qt_internal_set_exceptions_flags("${target}" "DEFAULT")
     else()
         qt_internal_set_exceptions_flags("${target}" "${arg_EXCEPTIONS}")
diff --git a/cmake/QtExecutableHelpers.cmake b/cmake/QtExecutableHelpers.cmake
index 692f76783de..49d341597d1 100644
--- a/cmake/QtExecutableHelpers.cmake
+++ b/cmake/QtExecutableHelpers.cmake
@@ -188,7 +188,7 @@ function(qt_internal_add_executable name)
         MACOSX_BUNDLE "${arg_GUI}"
     )
 
-    if(NOT DEFINED arg_EXCEPTIONS)
+    if(NOT arg_EXCEPTIONS)
         qt_internal_set_exceptions_flags("${name}" "DEFAULT")
     else()
         qt_internal_set_exceptions_flags("${name}" "${arg_EXCEPTIONS}")
diff --git a/cmake/QtModuleHelpers.cmake b/cmake/QtModuleHelpers.cmake
index a5ab9ec2bff..e033d7cd420 100644
--- a/cmake/QtModuleHelpers.cmake
+++ b/cmake/QtModuleHelpers.cmake
@@ -664,7 +664,7 @@ function(qt_internal_add_module target)
     # thus we can't use qt_internal_extend_target()'s PUBLIC_DEFINES option.
     target_compile_definitions(${target} INTERFACE QT_${module_define_infix}_LIB)
 
-    if(NOT DEFINED arg_EXCEPTIONS)
+    if(NOT arg_EXCEPTIONS)
         qt_internal_set_exceptions_flags("${target}" "DEFAULT")
     else()
         qt_internal_set_exceptions_flags("${target}" "${arg_EXCEPTIONS}")
diff --git a/cmake/QtPluginHelpers.cmake b/cmake/QtPluginHelpers.cmake
index 25380285ae1..88a5dbbe3e5 100644
--- a/cmake/QtPluginHelpers.cmake
+++ b/cmake/QtPluginHelpers.cmake
@@ -323,7 +323,7 @@ function(qt_internal_add_plugin target)
 
     qt_internal_add_repo_local_defines("${target}")
 
-    if(NOT DEFINED arg_EXCEPTIONS)
+    if(NOT arg_EXCEPTIONS)
         qt_internal_set_exceptions_flags("${target}" "DEFAULT")
     else()
         qt_internal_set_exceptions_flags("${target}" "${arg_EXCEPTIONS}")