diff --git a/entrypoint.sh b/entrypoint.sh
index f7c0447..ffa4817 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -13,7 +13,7 @@ else
     MEMLIMIT=$(grep MemTotal /proc/meminfo | awk '{print $2 * 1024}')
 fi
 
-if [[ $MEMLIMIT =~ ^[0-9]+$ ]]; then
+if ! [[ $MEMLIMIT =~ ^[0-9]+$ ]]; then
     MEMLIMIT=$MEMSIZE
 fi