diff --git a/srcpkgs/nsjail/patches/kafel-bison.patch b/srcpkgs/nsjail/patches/kafel-bison.patch
new file mode 100644
index 0000000000..2ed2479f37
--- /dev/null
+++ b/srcpkgs/nsjail/patches/kafel-bison.patch
@@ -0,0 +1,30 @@
+From 32768d3cc8cecbc30d9020dbfa8d9ec541d057e4 Mon Sep 17 00:00:00 2001
+From: Evangelos Foutras <evangelos@foutrelis.com>
+Date: Wed, 17 Mar 2021 16:36:40 +0200
+Subject: [PATCH] Replace YYUSE call with void cast in src/parser.y
+
+The YYUSE macro was renamed to YY_USE in bison 3.7.5; we might as well
+avoid using it altogether and cast the unused variable to void instead.
+
+Fixes the following linker error:
+
+/usr/bin/ld: kafel/libkafel.a(libkafel.o): in function `kafel_yyerror':
+arm_syscalls.c:(.text+0x6984): undefined reference to `YYUSE'
+---
+ src/parser.y | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git kafel/src/parser.y kafel/src/parser.y
+index e0f109c..0e01373 100644
+--- kafel/src/parser.y
++++ kafel/src/parser.y
+@@ -420,8 +420,8 @@ const_def
+ 
+ void yyerror(YYLTYPE * loc, struct kafel_ctxt* ctxt, yyscan_t scanner,
+              const char *msg) {
++  (void)scanner; /* suppress unused-parameter warning */
+   if (!ctxt->lexical_error) {
+-    YYUSE(scanner);
+     if (loc->filename != NULL) {
+       append_error(ctxt, "%s:%d:%d: %s", loc->filename, loc->first_line, loc->first_column, msg);
+     } else {
diff --git a/srcpkgs/nsjail/template b/srcpkgs/nsjail/template
index 5c0c4fe86a..acff592d2e 100644
--- a/srcpkgs/nsjail/template
+++ b/srcpkgs/nsjail/template
@@ -1,7 +1,7 @@
 # Template file for 'nsjail'
 pkgname=nsjail
 version=3.0
-revision=4
+revision=5
 build_style=gnu-makefile
 hostmakedepends="bison flex pkg-config protobuf which"
 makedepends="libnl3-devel protobuf-devel"