diff --git a/src/LinearMath/btMatrix3x3.h b/src/LinearMath/btMatrix3x3.h
index c4b07c589..9ee13f35d 100644
--- a/src/LinearMath/btMatrix3x3.h
+++ b/src/LinearMath/btMatrix3x3.h
@@ -496,9 +496,9 @@ public:
 		return m_el[r1][c1] * m_el[r2][c2] - m_el[r1][c2] * m_el[r2][c1];
 	}
 
-	virtual	void	serialize(struct	btMatrix3x3Data& dataOut) const;
+	void	serialize(struct	btMatrix3x3Data& dataOut) const;
 
-	virtual	void	deSerialize(const struct	btMatrix3x3Data& dataIn);
+	void	deSerialize(const struct	btMatrix3x3Data& dataIn);
 
 };
 
diff --git a/src/LinearMath/btTransform.h b/src/LinearMath/btTransform.h
index f7befeb26..67e4dd2be 100644
--- a/src/LinearMath/btTransform.h
+++ b/src/LinearMath/btTransform.h
@@ -201,9 +201,9 @@ public:
 		return identityTransform;
 	}
 
-	virtual	void	serialize(struct	btTransformData& dataOut) const;
+	void	serialize(struct	btTransformData& dataOut) const;
 
-	virtual	void	deSerialize(const struct	btTransformData& dataIn);
+	void	deSerialize(const struct	btTransformData& dataIn);
 
 };