diff --git a/cmake/modules/RootNewMacros.cmake b/cmake/modules/RootNewMacros.cmake
index 9a1fed0ab4651d6a44218336ca2e953a6826bd19..0cebb805a2360460b0125331ffa5a57f7ac3a958 100644
--- a/cmake/modules/RootNewMacros.cmake
+++ b/cmake/modules/RootNewMacros.cmake
@@ -246,7 +246,7 @@ function(ROOT_GENERATE_DICTIONARY dictionary)
   endforeach()
   string(REPLACE "${CMAKE_CURRENT_SOURCE_DIR}/inc/" ""  rheaderfiles "${headerfiles}")
   # Replace the non-standard folder layout of Core.
-  if (ARG_STAGE1 AND ${ARG_MODULE} STREQUAL "Core")
+  if (ARG_STAGE1 AND ARG_MODULE STREQUAL "Core")
     set(core_folders "base|clib|cont|doc|lzma|macosx|meta|metautils|multiproc|newdelete|pcre|rint|textinput|thread|unix|utils|winnt|zip")
     string(REGEX REPLACE "${CMAKE_SOURCE_DIR}/core/(${core_folders})/inc/" ""  rheaderfiles "${rheaderfiles}")
   endif()