diff --git a/mk/build.mk b/mk/build.mk
index b109adb..15a7914 100644
--- a/mk/build.mk
+++ b/mk/build.mk
@@ -38,14 +38,8 @@ CPPFLAGS += -DPB_ENABLE_MALLOC
 $(eval $(call addComponentWithRules,external/nanopb,$(NANOPB_SOURCES)))
 
 TINYCBOR_SOURCES := \
-	cborerrorstrings.c \
 	cborencoder.c \
-	cborencoder_close_container_checked.c \
-	cborparser.c \
-	cborparser_dup_string.c \
-	cborpretty.c \
-	cborpretty_stdio.c \
-	cbortojson.c
+	cborparser.c
 
 $(eval $(call addComponentWithRules,external/tinycbor/src,$(TINYCBOR_SOURCES)))
 $(eval $(call addComponentWithRules,external/util/src))