diff --git a/tests/fuzzing/asn1/Makefile b/tests/fuzzing/asn1/Makefile
index 63be4bcd4..428625934 100644
--- a/tests/fuzzing/asn1/Makefile
+++ b/tests/fuzzing/asn1/Makefile
@@ -4,6 +4,7 @@ include ../rules.include
 OBJS += $(SRC)/utils/common.o
 OBJS += $(SRC)/utils/os_unix.o
 OBJS += $(SRC)/utils/wpa_debug.o
+OBJS += $(SRC)/utils/wpabuf.o
 OBJS += $(SRC)/tls/asn1.o
 
 asn1: asn1.o $(OBJS) $(LIBS)