diff --git a/src/org/joml/Rectanglei.java b/src/org/joml/Rectanglei.java
index a7f474fed..69931b83e 100644
--- a/src/org/joml/Rectanglei.java
+++ b/src/org/joml/Rectanglei.java
@@ -649,10 +649,10 @@ public String toString(NumberFormat formatter) {
     }
 
     public void writeExternal(ObjectOutput out) throws IOException {
-        out.writeFloat(minX);
-        out.writeFloat(minY);
-        out.writeFloat(maxX);
-        out.writeFloat(maxY);
+        out.writeInt(minX);
+        out.writeInt(minY);
+        out.writeInt(maxX);
+        out.writeInt(maxY);
     }
 
     public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {