diff --git a/source/Makefile.in b/source/Makefile.in
index 2eb31a5..3464a18 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@ -Wno-yacc
+YACC		= @YACC@
 INSTALL		= @INSTALL@
 INSTALL_PROGRAM	= @INSTALL_PROGRAM@
 INSTALL_DATA	= @INSTALL_DATA@