diff --git a/srcpkgs/nsjail/template b/srcpkgs/nsjail/template
index 161e7c0c526..7b724cdf833 100644
--- a/srcpkgs/nsjail/template
+++ b/srcpkgs/nsjail/template
@@ -15,6 +15,7 @@ checksum="28afa89c7dbed94528408e4f11d724622d24ea582739b254fa2a739320e87481
 bfebebaf501f9dbd0d0c374797d3c07ee0dd3537b5a6bc70e80408f081d051fe"
 
 only_for_archs="aarch64 aarch64-musl armv5tel armv5tel-musl armv6l armv6l-musl armv7l armv7l-musl x86_64 x86_64-musl"
+CXXFLAGS="-Wno-format-truncation"
 
 post_extract() {
 	rmdir kafel