diff --git a/src/external/MagProximity/CMakeLists.txt b/src/external/MagProximity/CMakeLists.txt
index acac4032..8923f3cf 100644
--- a/src/external/MagProximity/CMakeLists.txt
+++ b/src/external/MagProximity/CMakeLists.txt
@@ -10,7 +10,10 @@ root_generate_dictionary(
   LINKDEF PMagProximityFitterLinkDef.h
 )
 root_generate_dictionary(
-  PMPStartupHandlerDict PMPStartupHandler.h LINKDEF PMPStartupHandlerLinkDef.h
+  PMPStartupHandlerDict 
+  -I${MUSRFIT_INC}
+  PMPStartupHandler.h 
+  LINKDEF PMPStartupHandlerLinkDef.h
 )
 
 #--- create pkg-config info ---------------------------------------------------
diff --git a/src/external/libPhotoMeissner/classes/CMakeLists.txt b/src/external/libPhotoMeissner/classes/CMakeLists.txt
index 80d284a2..99fecd68 100644
--- a/src/external/libPhotoMeissner/classes/CMakeLists.txt
+++ b/src/external/libPhotoMeissner/classes/CMakeLists.txt
@@ -13,6 +13,7 @@ root_generate_dictionary(
 )
 root_generate_dictionary(
   PStartupHandler_PMDict 
+  -I${MUSRFIT_INC}
   -I${CMAKE_CURRENT_SOURCE_DIR}/../include 
   PStartupHandler_PM.h 
   LINKDEF ${CMAKE_CURRENT_SOURCE_DIR}/../include/PStartupHandler_PMLinkDef.h