diff --git a/1985/shapiro/Makefile b/1985/shapiro/Makefile
index f2f18b470..6aa897cc0 100644
--- a/1985/shapiro/Makefile
+++ b/1985/shapiro/Makefile
@@ -137,7 +137,7 @@ alt: data ${ALT_TARGET}
 	@${TRUE}
 
 # variable to control size of maze for alt code
-SIZE=39
+SIZE= 39
 
 ${PROG}.alt: ${PROG}.alt.c
 	${CC} ${CFLAGS} -DC=${SIZE} $< -o $@ ${LDFLAGS}