diff --git a/13.0/apache/entrypoint.sh b/13.0/apache/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/13.0/apache/entrypoint.sh
+++ b/13.0/apache/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/13.0/fpm-alpine/entrypoint.sh b/13.0/fpm-alpine/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/13.0/fpm-alpine/entrypoint.sh
+++ b/13.0/fpm-alpine/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/13.0/fpm/entrypoint.sh b/13.0/fpm/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/13.0/fpm/entrypoint.sh
+++ b/13.0/fpm/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/14.0/apache/entrypoint.sh b/14.0/apache/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/14.0/apache/entrypoint.sh
+++ b/14.0/apache/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/14.0/fpm-alpine/entrypoint.sh b/14.0/fpm-alpine/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/14.0/fpm-alpine/entrypoint.sh
+++ b/14.0/fpm-alpine/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/14.0/fpm/entrypoint.sh b/14.0/fpm/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/14.0/fpm/entrypoint.sh
+++ b/14.0/fpm/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/15.0/apache/entrypoint.sh b/15.0/apache/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/15.0/apache/entrypoint.sh
+++ b/15.0/apache/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/15.0/fpm-alpine/entrypoint.sh b/15.0/fpm-alpine/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/15.0/fpm-alpine/entrypoint.sh
+++ b/15.0/fpm-alpine/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/15.0/fpm/entrypoint.sh b/15.0/fpm/entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/15.0/fpm/entrypoint.sh
+++ b/15.0/fpm/entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 6e271bca..5f0dd542 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -132,7 +132,7 @@ fi
 ## APACHE SSL configuration (self signed certificates)
 echo "net voor de loop"
 
-if [ -n "${APACHE_SSL_SELFSIGNED+x}" "true" ] ; then
+if [ -n "${APACHE_SSL_SELFSIGNED}" "true" ] ; then
 # if [ -d "/etc/apache2" ]; then
   echo "in de apache loop"	
   a2enmod ssl