diff --git a/php-fpm/Dockerfile-70 b/php-fpm/Dockerfile-70
index 3b8f493..5a67ff1 100644
--- a/php-fpm/Dockerfile-70
+++ b/php-fpm/Dockerfile-70
@@ -287,7 +287,7 @@ RUN if [ ${INSTALL_INTL} = true ]; then \
 #####################################
 
 ARG INSTALL_GHOSTSCRIPT=false
-RUN if [ ${GHOSTSCRIPT} = true ]; then \
+RUN if [ ${INSTALL_GHOSTSCRIPT} = true ]; then \
     # Install the ghostscript extension
     # for PDF editing
     apt-get -y update \