diff --git a/srcpkgs/opensc/template b/srcpkgs/opensc/template
index e06c2725eda..5428607d048 100644
--- a/srcpkgs/opensc/template
+++ b/srcpkgs/opensc/template
@@ -15,6 +15,7 @@ homepage="https://github.com/OpenSC/OpenSC/wiki"
 distfiles="https://github.com/OpenSC/OpenSC/archive/${version}.tar.gz"
 checksum=c0b803ba36aac9b5fef7f249adb9dffaf3f298db85304531b6a0574519743cf2
 conf_files="/etc/opensc.conf"
+CFLAGS="-Wno-error=format-overflow"
 
 pre_configure() {
 	autoreconf -fi