diff --git a/CMakeModules/FindwxWidgets.cmake b/CMakeModules/FindwxWidgets.cmake
index 795ea7765e..6734c2636a 100644
--- a/CMakeModules/FindwxWidgets.cmake
+++ b/CMakeModules/FindwxWidgets.cmake
@@ -783,6 +783,10 @@ ELSE(wxWidgets_FIND_STYLE STREQUAL "win32")
         STRING(REPLACE "-I" ""
           wxWidgets_INCLUDE_DIRS "${wxWidgets_INCLUDE_DIRS}")
 
+        # Flags are a string, not a list, fix it here
+        string(REPLACE ";" " "
+          wxWidgets_CXX_FLAGS "${wxWidgets_CXX_FLAGS}")
+
         DBG_MSG_V("wxWidgets_DEFINITIONS=${wxWidgets_DEFINITIONS}")
         DBG_MSG_V("wxWidgets_INCLUDE_DIRS=${wxWidgets_INCLUDE_DIRS}")
         DBG_MSG_V("wxWidgets_CXX_FLAGS=${wxWidgets_CXX_FLAGS}")