diff --git a/src/Magnum/CMakeLists.txt b/src/Magnum/CMakeLists.txt
index e173536c6..2baa45ca1 100644
--- a/src/Magnum/CMakeLists.txt
+++ b/src/Magnum/CMakeLists.txt
@@ -126,7 +126,7 @@ if(MAGNUM_BUILD_DEPRECATED)
 endif()
 
 # Functionality specific to static Windows builds
-if(CORRADE_TARGET_WINDOWS AND NOT CORRADE_TARGET_WINDOWS_RT AND MAGNUM_BUILD_STATIC)
+if(CORRADE_TARGET_WINDOWS AND NOT CORRADE_TARGET_WINDOWS_RT AND MAGNUM_BUILD_STATIC AND MAGNUM_BUILD_STATIC_UNIQUE_GLOBALS)
     list(APPEND Magnum_SRCS Implementation/WindowsWeakSymbol.cpp)
     list(APPEND Magnum_PRIVATE_HEADERS Implementation/WindowsWeakSymbol.h)
 endif()