diff --git a/lib/Makefile.msvc b/lib/Makefile.msvc
index c34b6995..391ae0e3 100644
--- a/lib/Makefile.msvc
+++ b/lib/Makefile.msvc
@@ -90,7 +90,8 @@ NGHTTP2_SRC := nghttp2_pq.c \
   nghttp2_option.c \
   nghttp2_callbacks.c \
   nghttp2_mem.c \
-  nghttp2_http.c
+  nghttp2_http.c \
+  nghttp2_rcbuf.c
 
 NGHTTP2_OBJ_R := $(addprefix $(OBJ_DIR)/r_, $(notdir $(NGHTTP2_SRC:.c=.obj)))
 NGHTTP2_OBJ_D := $(addprefix $(OBJ_DIR)/d_, $(notdir $(NGHTTP2_SRC:.c=.obj)))