diff --git a/src/external/libGbGLF/CMakeLists.txt b/src/external/libGbGLF/CMakeLists.txt
index 8b0b0eaf..4edfdbf9 100644
--- a/src/external/libGbGLF/CMakeLists.txt
+++ b/src/external/libGbGLF/CMakeLists.txt
@@ -8,6 +8,7 @@ set(PREFIX_INC ${CMAKE_INSTALL_PREFIX}/include)
 root_generate_dictionary(
   PGbGLFDict 
   -I${GBGLF_INC} 
+  -I${MUSRFIT_INC}
   -I${CMAKE_CURRENT_SOURCE_DIR}
   -I${PREFIX_INC} 
   PGbGLF.h