diff --git a/reactos/cmake/msvc.cmake b/reactos/cmake/msvc.cmake
index 99d10f7a18b..7d213195eee 100644
--- a/reactos/cmake/msvc.cmake
+++ b/reactos/cmake/msvc.cmake
@@ -121,7 +121,14 @@ set(CMAKE_ASM_CREATE_STATIC_LIBRARY ${CMAKE_C_CREATE_STATIC_LIBRARY})
 
 if(PCH)
     macro(add_pch _target _pch _sources)
-        set(_gch ${CMAKE_CURRENT_BINARY_DIR}/${_target}.pch)
+
+        # Workaround for the MSVC toolchain (MSBUILD) /MP bug
+        set(_temp_gch ${CMAKE_CURRENT_BINARY_DIR}/${_target}.pch)
+        if(MSVC_IDE)
+            file(TO_NATIVE_PATH ${_temp_gch} _gch)
+        else()
+            set(_gch ${_temp_gch})
+        endif()
 
         if(IS_CPP)
             set(_pch_language CXX)