diff --git a/crypto/bn/Makefile b/crypto/bn/Makefile
index 7f7b3a0bfbab36bf2384186049b76b1cc5ab913a..6926c77799216afe17313059105ec833f44ca05e 100644
--- a/crypto/bn/Makefile
+++ b/crypto/bn/Makefile
@@ -83,7 +83,7 @@ sparcv8.o:	asm/sparcv8.S
 sparcv8plus.o:	asm/sparcv8plus.S
 	$(CC) $(CFLAGS) -c asm/sparcv8plus.S
 
-bn-mips3.s:	asm/mips3.s
+bn-mips3.o:	asm/mips3.s
 	@if [ "$(CC)" = "gcc" ]; then \
 		ABI=`expr "$(CFLAGS)" : ".*-mabi=\([n3264]*\)"` && \
 		as -$$ABI -O -o $@ asm/mips3.s; \