diff --git a/entrypoint.sh b/entrypoint.sh
index a4581c6..6bb0456 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -13,6 +13,10 @@ else
     MEMLIMIT=$(grep MemTotal /proc/meminfo | awk '{print $2 * 1024}')
 fi
 
+if ! [[ "$MEMLIMIT" =~ ^[0-9]+$ ]]; then
+    MEMLIMIT=$MEMSIZE
+fi
+
 MEMLIMIT=$((MEMLIMIT<MEMSIZE ? MEMLIMIT : MEMSIZE))
 
 MEMOFFSET_THRESH=4294967296