diff --git a/testssl.sh b/testssl.sh
index c8ffdcf..018681f 100755
--- a/testssl.sh
+++ b/testssl.sh
@@ -72,7 +72,7 @@ echo $VERSION | egrep -q "dev|rc" && \
        SWURL="https://testssl.sh     "
 
 readonly PROG_NAME=$(basename "$0")
-readonly RUN_DIR=$(dirname $0)
+readonly RUN_DIR=$(dirname $(readlink -e $0))
 INSTALL_DIR=""
 MAP_RFC_FNAME=""