diff --git a/Source/LParse/Makefile.in b/Source/LParse/Makefile.in
index 513f867bd..990d27755 100644
--- a/Source/LParse/Makefile.in
+++ b/Source/LParse/Makefile.in
@@ -9,6 +9,8 @@ RPATH       = @RPATH@
 SO          = @SO@
 CCSHARED    = @CCSHARED@
 LDSHARED    = @LDSHARED@
+YACC        = @YACC@
+
 INCLUDE     = -I. -I../Swig -I../DOH/Include -I../Preprocessor
 
 SRCS = cscanner.c type.c