diff --git a/src/pocketmine/MemoryManager.php b/src/pocketmine/MemoryManager.php
index 8b291dd9c..a3111af69 100644
--- a/src/pocketmine/MemoryManager.php
+++ b/src/pocketmine/MemoryManager.php
@@ -89,6 +89,11 @@ class MemoryManager{
 
 		$hardLimit = ((int) $this->server->getProperty("memory.main-hard-limit", $defaultMemory));
 
+		if(PHP_INT_SIZE === 4 and $hardLimit >= 4096){
+			$this->server->getLogger()->warning("Cannot set memory limit higher than 4GB on 32-bit, defaulting to max 4095MB");
+			$hardLimit = 4095;
+		}
+
 		if($hardLimit <= 0){
 			ini_set("memory_limit", -1);
 		}else{