diff --git a/Pmodules/modulefile b/Pmodules/modulefile
index 16df9dc..8dec4df 100644
--- a/Pmodules/modulefile
+++ b/Pmodules/modulefile
@@ -20,6 +20,8 @@ if { [module-info mode load] } {
     	    remove-path PATH $str
         }
     }
+    remove-path C_INCLUDE_PATH "$PREFIX/include"
+    remove-path CPLUS_INCLUDE_PATH "$PREFIX/include"
 }
 
 set shell [module-info shell]