--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,10 +62,11 @@ ELSE()
 	MESSAGE(FATAL_ERROR "Invalid TLS provider option, use none|openssl|cyassl")
 ENDIF()
 
+FIND_LIBRARY(json json-c json)
 IF(UBUS_SUPPORT)
 	ADD_DEFINITIONS(-DHAVE_UBUS)
 	ADD_LIBRARY(uhttpd_ubus MODULE uhttpd-ubus.c)
-	TARGET_LINK_LIBRARIES(uhttpd_ubus ubox ubus json blobmsg_json)
+	TARGET_LINK_LIBRARIES(uhttpd_ubus ubox ubus ${json} blobmsg_json)
 	SET(PLUGINS ${PLUGINS} uhttpd_ubus)
 ENDIF()