diff --git a/src/java/org/lwjgl/util/vector/Matrix2f.java b/src/java/org/lwjgl/util/vector/Matrix2f.java
index 894b4b94..2f9e2ffd 100644
--- a/src/java/org/lwjgl/util/vector/Matrix2f.java
+++ b/src/java/org/lwjgl/util/vector/Matrix2f.java
@@ -333,7 +333,7 @@ public class Matrix2f extends Matrix implements Serializable {
 	 * @return the negated matrix
 	 */
 	public Matrix2f negate(Matrix2f dest) {
-		return negate(this, this);
+		return negate(this, dest);
 	}
 
 	/**
diff --git a/src/java/org/lwjgl/util/vector/Matrix3f.java b/src/java/org/lwjgl/util/vector/Matrix3f.java
index 3d3128c3..63c20de6 100644
--- a/src/java/org/lwjgl/util/vector/Matrix3f.java
+++ b/src/java/org/lwjgl/util/vector/Matrix3f.java
@@ -431,7 +431,7 @@ public class Matrix3f extends Matrix implements Serializable {
 	 * @return the negated matrix
 	 */
 	public Matrix3f negate(Matrix3f dest) {
-		return negate(this, this);
+		return negate(this, dest);
 	}
 
 	/**
diff --git a/src/java/org/lwjgl/util/vector/Matrix4f.java b/src/java/org/lwjgl/util/vector/Matrix4f.java
index 96645b02..b24dca62 100644
--- a/src/java/org/lwjgl/util/vector/Matrix4f.java
+++ b/src/java/org/lwjgl/util/vector/Matrix4f.java
@@ -814,7 +814,7 @@ public class Matrix4f extends Matrix implements Serializable {
 	 * @return the negated matrix
 	 */
 	public Matrix4f negate(Matrix4f dest) {
-		return negate(this, this);
+		return negate(this, dest);
 	}
 
 	/**