diff --git a/Source/Preprocessor/cpp.c b/Source/Preprocessor/cpp.c
index 8f050e820..9cf1a85a6 100644
--- a/Source/Preprocessor/cpp.c
+++ b/Source/Preprocessor/cpp.c
@@ -35,7 +35,7 @@ static char cvsroot[] = "$Header$";
  * ----------------------------------------------------------------------------- */
 
 static DOH  *cpp = 0;                /* C preprocessor data */
-static int   include_all = 1;        /* Follow all includes */
+static int   include_all = 0;        /* Follow all includes */
 static int   single_include = 1;     /* Only include each file once */
 static int   silent_errors = 0;
 static DOH  *included_files = 0;