diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
index c8c645a31..8eb71efc1 100644
--- a/toolchain/helpers.mk
+++ b/toolchain/helpers.mk
@@ -288,6 +288,7 @@ check_uclibc = \
 # configuration of the external toolchain.
 #
 # $1: cross-gcc path
+# $2: cross-readelf path
 #
 check_arm_abi = \
 	__CROSS_CC=$(strip $1) ; \