diff --git a/source/Makefile.in b/source/Makefile.in
index 3464a18..2eb31a5 100644
--- a/source/Makefile.in
+++ b/source/Makefile.in
@@ -13,7 +13,7 @@ CC 		= @CC@
 INCLUDES	= -I./include
 CFLAGS		= @CFLAGS@ -fno-builtin
 LIBS 		= @LIBS@ @CLOCK_LIB@
-YACC		= @YACC@
+YACC		= @YACC@ -Wno-yacc
 INSTALL		= @INSTALL@
 INSTALL_PROGRAM	= @INSTALL_PROGRAM@
 INSTALL_DATA	= @INSTALL_DATA@
diff --git a/source/bforce/expression.y b/source/bforce/expression.y
index e66807d..34f7a8f 100644
--- a/source/bforce/expression.y
+++ b/source/bforce/expression.y
@@ -44,7 +44,7 @@
 %token AROP
 %token LOGOP
 
-/* %expect 2 */
+%expect 2
 
 %{
 #include "includes.h"