diff --git a/mod_image_for_test.sh b/mod_image_for_test.sh
index 6b99b6d2e0..650a0d5bee 100755
--- a/mod_image_for_test.sh
+++ b/mod_image_for_test.sh
@@ -41,6 +41,7 @@ eval set -- "${FLAGS_ARGV}"
 
 EMERGE_CMD="emerge"
 EMERGE_BOARD_CMD="emerge-${FLAGS_board}"
+TOP_SCRIPTS_DIR="$(dirname $0)"
 if [ -e "${TOP_SCRIPTS_DIR}/.emerge" ]; then
   .  "${TOP_SCRIPTS_DIR}/.emerge"
 fi