diff --git a/pkg/nanocoap/Makefile b/pkg/nanocoap/Makefile
index e0349802eb..45c514c10e 100644
--- a/pkg/nanocoap/Makefile
+++ b/pkg/nanocoap/Makefile
@@ -1,6 +1,7 @@
 PKG_NAME=nanocoap
 PKG_URL=https://github.com/kaspar030/sock
 PKG_VERSION=cf2aff1b4322cee06bb5b24d0215bb764372fba7
+PKG_LICENSE=LGPL-2.1
 
 .PHONY: all