diff --git a/fuzz/Makefile b/fuzz/Makefile
index a5687cc3..c661b8a0 100644
--- a/fuzz/Makefile
+++ b/fuzz/Makefile
@@ -31,6 +31,8 @@ MULTIPART_SRC = ../src/formats/multipart_parser.c
 HTTP1_SRC = \
     ../src/http1/http_parser.c \
     ../src/core/body_pool.c \
+    ../src/core/http_protocol_handlers.c \
+    ../src/grpc/grpc.c \
     ../src/formats/multipart_parser.c \
     ../src/formats/multipart_processor.c \
     ../src/http_param_parse.c \
@@ -63,6 +65,8 @@ H2_SRC = \
     ../src/http2/http2_stream.c \
     ../src/http1/http_parser.c \
     ../src/core/body_pool.c \
+    ../src/core/http_protocol_handlers.c \
+    ../src/grpc/grpc.c \
     ../src/formats/multipart_parser.c \
     ../src/formats/multipart_processor.c \
     ../src/http_param_parse.c \