diff --git a/core/src/main/java/com/zaxxer/hikari/javassist/HikariClassTransformer.java b/core/src/main/java/com/zaxxer/hikari/javassist/HikariClassTransformer.java
index 4ac3df9d..13b425f5 100644
--- a/core/src/main/java/com/zaxxer/hikari/javassist/HikariClassTransformer.java
+++ b/core/src/main/java/com/zaxxer/hikari/javassist/HikariClassTransformer.java
@@ -212,7 +212,7 @@ public class HikariClassTransformer implements ClassFileTransformer
 
         if (LOGGER.isDebugEnabled())
         {
-            target.debugWriteFile("/tmp");
+            target.debugWriteFile(System.getProperty("java.io.tmpdir"));
         }
         return target.toBytecode();
     }