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 6c7bf51a4..d0e42e09d 100644
--- a/src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java
+++ b/src/main/java/org/apache/commons/math3/linear/OpenMapRealMatrix.java
@@ -27,7 +27,13 @@ import org.apache.commons.math3.util.OpenIntToDoubleHashMap;
  *
  * @version $Id$
  * @since 2.0
+ * @deprecated As of version 3.1, this class is deprecated, for reasons exposed
+ * in this JIRA
+ * <a href="https://issues.apache.org/jira/browse/MATH-870">ticket</a>. This
+ * class will be removed in version 4.0.
+ *
  */
+@Deprecated
 public class OpenMapRealMatrix extends AbstractRealMatrix
     implements SparseRealMatrix, Serializable {
     /** Serializable version identifier. */
diff --git a/src/main/java/org/apache/commons/math3/linear/SparseRealMatrix.java b/src/main/java/org/apache/commons/math3/linear/SparseRealMatrix.java
index 0f4af780b..a0156b675 100644
--- a/src/main/java/org/apache/commons/math3/linear/SparseRealMatrix.java
+++ b/src/main/java/org/apache/commons/math3/linear/SparseRealMatrix.java
@@ -22,8 +22,13 @@ package org.apache.commons.math3.linear;
  *
  * @version $Id$
  * @since 2.0
+ * @deprecated As of version 3.1, this class is deprecated, for reasons exposed
+ * in this JIRA
+ * <a href="https://issues.apache.org/jira/browse/MATH-870">ticket</a>. This
+ * class will be removed in version 4.0.
  *
  */
+@Deprecated
 public interface SparseRealMatrix extends RealMatrix {
 
 }