diff --git a/cmake/QtInternalTargets.cmake b/cmake/QtInternalTargets.cmake
index 84faba14138..2fd99c7be32 100644
--- a/cmake/QtInternalTargets.cmake
+++ b/cmake/QtInternalTargets.cmake
@@ -194,7 +194,7 @@ if (MSVC)
 
     target_link_options(PlatformCommonInternal INTERFACE
         -DYNAMICBASE -NXCOMPAT
-        $<$<NOT:$<CONFIG:Debug>>:-OPT:REF>
+        $<$<NOT:$<CONFIG:Debug>>:-OPT:REF -OPT:ICF>
     )
 endif()
 
diff --git a/mkspecs/common/msvc-desktop.conf b/mkspecs/common/msvc-desktop.conf
index 33b4dc70c63..68980ff5cf9 100644
--- a/mkspecs/common/msvc-desktop.conf
+++ b/mkspecs/common/msvc-desktop.conf
@@ -85,8 +85,8 @@ QMAKE_RUN_CXX_IMP_BATCH = $(CXX) -c $(CXXFLAGS) $(INCPATH) -Fo$@ @<<
 
 QMAKE_LINK              = link
 QMAKE_LFLAGS            = /NOLOGO /DYNAMICBASE /NXCOMPAT
-QMAKE_LFLAGS_RELEASE    = /OPT:REF /INCREMENTAL:NO
-QMAKE_LFLAGS_RELEASE_WITH_DEBUGINFO = /DEBUG /OPT:REF /INCREMENTAL:NO
+QMAKE_LFLAGS_RELEASE    = /OPT:REF /OPT:ICF /INCREMENTAL:NO
+QMAKE_LFLAGS_RELEASE_WITH_DEBUGINFO = $$QMAKE_LFLAGS_RELEASE /DEBUG
 QMAKE_LFLAGS_DEBUG      = /DEBUG
 QMAKE_LFLAGS_CONSOLE    = /SUBSYSTEM:CONSOLE
 QMAKE_LFLAGS_WINDOWS    = /SUBSYSTEM:WINDOWS