diff --git a/cmake/Modules/MacroQbtCommonConfig.cmake b/cmake/Modules/MacroQbtCommonConfig.cmake
index 36bbc7d36..e703437f4 100644
--- a/cmake/Modules/MacroQbtCommonConfig.cmake
+++ b/cmake/Modules/MacroQbtCommonConfig.cmake
@@ -21,6 +21,7 @@ macro(qbt_common_config)
         QT_NO_CAST_FROM_ASCII
         QT_NO_CAST_TO_ASCII
         QT_NO_CAST_FROM_BYTEARRAY
+        QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
         QT_USE_QSTRINGBUILDER
         QT_STRICT_ITERATORS
         $<$<NOT:$<CONFIG:Debug>>:QT_NO_DEBUG_OUTPUT>
diff --git a/src/src.pro b/src/src.pro
index 3291793f6..dc164a5e2 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -61,12 +61,14 @@ CONFIG(release, debug|release) {
 include(../version.pri)
 
 # Qt defines
-DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x050f02
-DEFINES += QT_NO_CAST_FROM_ASCII
-DEFINES += QT_NO_CAST_TO_ASCII
-DEFINES += QT_NO_CAST_FROM_BYTEARRAY
-DEFINES += QT_USE_QSTRINGBUILDER
-DEFINES += QT_STRICT_ITERATORS
+DEFINES += \
+    QT_DISABLE_DEPRECATED_BEFORE=0x050f02 \
+    QT_NO_CAST_FROM_ASCII \
+    QT_NO_CAST_TO_ASCII \
+    QT_NO_CAST_FROM_BYTEARRAY \
+    QT_NO_NARROWING_CONVERSIONS_IN_CONNECT \
+    QT_USE_QSTRINGBUILDER \
+    QT_STRICT_ITERATORS
 
 INCLUDEPATH += $$PWD