diff --git a/ipcalc.spec b/ipcalc.spec
index bf333c6..d860825 100644
--- a/ipcalc.spec
+++ b/ipcalc.spec
@@ -6,7 +6,7 @@ License: GPLv2+
 URL: https://gitlab.com/ipcalc/ipcalc
 Source0: https://gitlab.com/ipcalc/ipcalc/-/archive/%{version}/ipcalc-%{version}.tar.gz
 
-BuildRequires: gcc, libmaxminddb-devel, meson, rubygem(ronn)
+BuildRequires: gcc, libmaxminddb-devel, meson, rubygem-ronn-ng
 Recommends:    libmaxminddb, geolite2-city, geolite2-country
 
 # Explicitly conflict with older initscript packages that ship ipcalc