diff --git a/src/main/java/org/apache/commons/math3/linear/AbstractRealMatrix.java b/src/main/java/org/apache/commons/math3/linear/AbstractRealMatrix.java
index 769d3b782..d1a8bf09a 100644
--- a/src/main/java/org/apache/commons/math3/linear/AbstractRealMatrix.java
+++ b/src/main/java/org/apache/commons/math3/linear/AbstractRealMatrix.java
@@ -73,9 +73,6 @@ public abstract class AbstractRealMatrix
         }
     }
 
-    /** {@inheritDoc} */
-    public abstract RealMatrix copy();
-
     /** {@inheritDoc} */
     public RealMatrix add(RealMatrix m)
         throws MatrixDimensionMismatchException {
diff --git a/src/main/java/org/apache/commons/math3/linear/Array2DRowRealMatrix.java b/src/main/java/org/apache/commons/math3/linear/Array2DRowRealMatrix.java
index 782f15e55..436db7ac7 100644
--- a/src/main/java/org/apache/commons/math3/linear/Array2DRowRealMatrix.java
+++ b/src/main/java/org/apache/commons/math3/linear/Array2DRowRealMatrix.java
@@ -145,7 +145,6 @@ public class Array2DRowRealMatrix extends AbstractRealMatrix implements Serializ
     }
 
     /** {@inheritDoc} */
-    @Override
     public RealMatrix copy() {
         return new Array2DRowRealMatrix(copyOut(), false);
     }
diff --git a/src/main/java/org/apache/commons/math3/linear/BlockRealMatrix.java b/src/main/java/org/apache/commons/math3/linear/BlockRealMatrix.java
index c7f6391ec..a40950ef8 100644
--- a/src/main/java/org/apache/commons/math3/linear/BlockRealMatrix.java
+++ b/src/main/java/org/apache/commons/math3/linear/BlockRealMatrix.java
@@ -271,7 +271,6 @@ public class BlockRealMatrix extends AbstractRealMatrix implements Serializable
     }
 
     /** {@inheritDoc} */
-    @Override
     public BlockRealMatrix copy() {
         // create an empty matrix
         BlockRealMatrix copied = new BlockRealMatrix(rows, columns);
diff --git a/src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java b/src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java
index ef16fd8d9..4177dca51 100644
--- a/src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java
+++ b/src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java
@@ -69,7 +69,6 @@ public class OpenMapRealMatrix extends AbstractRealMatrix
     }
 
     /** {@inheritDoc} */
-    @Override
     public OpenMapRealMatrix copy() {
         return new OpenMapRealMatrix(this);
     }