diff --git a/2006/grothe/Makefile b/2006/grothe/Makefile
index 78a674479..cbf88b9f1 100644
--- a/2006/grothe/Makefile
+++ b/2006/grothe/Makefile
@@ -108,7 +108,7 @@ ENTRY= grothe
 PROG= ${ENTRY}
 #
 OBJ= ${PROG}.o
-DATA= arabian.txt olympic.txt twinkle.txt test.txt
+DATA= arabian.txt olympics.txt twinkle.txt test.txt
 TARGET= ${PROG}
 #
 ALT_OBJ=