diff --git a/Dockerfile b/Dockerfile
index 7935364..ea79b6d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -39,7 +39,7 @@ RUN \
     /usr/bin && \
   echo "**** configure php-fpm to pass env vars ****" && \
   sed -E -i 's/^;?clear_env ?=.*$/clear_env = no/g' /etc/php84/php-fpm.d/www.conf && \
-  grep -qxF 'clear_env = no' /etc/php84/php-fpm.d/www.conf || echo 'clear_env = no' >> /etc/php84/php-fpm.d/www.conf && \
+  if ! grep -qxF 'clear_env = no' /etc/php84/php-fpm.d/www.conf; then echo 'clear_env = no' >> /etc/php84/php-fpm.d/www.conf; fi && \ echo 'clear_env = no' >> /etc/php84/php-fpm.d/www.conf && \
   echo "env[PATH] = /usr/local/bin:/usr/bin:/bin" >> /etc/php84/php-fpm.conf && \
   echo "*** install speedtest-tracker ***" && \
   if [ -z ${SPEEDTEST_TRACKER_VERSION+x} ]; then \
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index 16b39fb..c987970 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -39,7 +39,7 @@ RUN \
     /usr/bin && \
   echo "**** configure php-fpm to pass env vars ****" && \
   sed -E -i 's/^;?clear_env ?=.*$/clear_env = no/g' /etc/php84/php-fpm.d/www.conf && \
-  grep -qxF 'clear_env = no' /etc/php84/php-fpm.d/www.conf || echo 'clear_env = no' >> /etc/php84/php-fpm.d/www.conf && \
+  if ! grep -qxF 'clear_env = no' /etc/php84/php-fpm.d/www.conf; then echo 'clear_env = no' >> /etc/php84/php-fpm.d/www.conf; fi && \ echo 'clear_env = no' >> /etc/php84/php-fpm.d/www.conf && \
   echo "env[PATH] = /usr/local/bin:/usr/bin:/bin" >> /etc/php84/php-fpm.conf && \
   echo "*** install speedtest-tracker ***" && \
   if [ -z ${SPEEDTEST_TRACKER_VERSION+x} ]; then \