diff --git a/Makefile.in b/Makefile.in
index 2ed17f1f7..7b23afd29 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -50,7 +50,7 @@ CC=@CC@
 CPPFLAGS=@CPPFLAGS@  -I. -I$(srcdir)/H -I$(srcdir)/OPTYap
 CFLAGS= @CFLAGS@ $(YAP_EXTRAS) $(DEFS) $(CPPFLAGS)
 C_INTERF_FLAGS= @C_INTERF_FLAGS@ $(YAP_EXTRAS) $(DEFS) $(CPPFLAGS) -I$(srcdir)/include
-C_PARSER_FLAGS= @C_PARSER_FLAGS@ $(YAP_EXTRAS) $(DEFS) $(CPPFLAGS) -I$(srcdir)/include
+C_PARSER_FLAGS= @C_PARSER_FLAGS@ $(YAP_EXTRAS) $(DEFS) $(CPPFLAGS)
 #
 #
 # You shouldn't need to change what follows.