diff --git a/runtc b/runtc
index 4adf51c..a53d983 100755
--- a/runtc
+++ b/runtc
@@ -7,9 +7,6 @@ while getopts a:gh OPT; do
     a)
       arch="$OPTARG"
       ;;
-    g)
-      gem5=true
-      ;;
     h)
       printf "Usage: $0 TOOL [TOOL_ARGS]...
 Call a built ToolChain tool. Example:
@@ -23,6 +20,6 @@ done
 shift "$(($OPTIND - 1))"
 tool="$1"
 shift
-set_common_vars "$arch" "$gem5"
+set_common_vars "$arch"
 "${buildroot_out_dir}/host/bin/"*-buildroot-*"${tool}" "$@"
 exit "$?"