diff --git a/hidviz.spec b/hidviz.spec
index 793d743..ca0fb91 100644
--- a/hidviz.spec
+++ b/hidviz.spec
@@ -16,6 +16,7 @@ BuildRequires:	asio-devel
 BuildRequires:	desktop-file-utils
 BuildRequires:	ImageMagick
 # https://github.com/ondrejbudai/hidviz/issues/27
+# https://github.com/ondrejbudai/libhidx/pull/18
 Patch0:		hidviz-0.1.5-build-fix.patch
 Patch1:		hidviz-gcc11.patch