diff --git a/hashtest/Makefile b/hashtest/Makefile
index 168319c..edf01cb 100644
--- a/hashtest/Makefile
+++ b/hashtest/Makefile
@@ -1,6 +1,9 @@
 
 CFLAGS=-DHASH_DEBUG -O2 -Wall
-OBJ=../hash.o ../gap.o htest.o
+OBJ=hash.o ../gap.o htest.o
+
+hash.o: ../hash.c
+	$(CC) $(CFLAGS) -c -o $@ $<
 
 htest: $(OBJ)
 	$(CC) -o htest $(OBJ)
diff --git a/hashtest/htest.c b/hashtest/htest.c
index 55c0cf9..fb83f4c 100644
--- a/hashtest/htest.c
+++ b/hashtest/htest.c
@@ -29,6 +29,7 @@ struct hash_item {
 };
 
 typedef struct hash_item* hash_item;
+typedef struct hash hash;
 
 #include "../hash.h"