diff --git a/src/main/java/org/apache/commons/math/analysis/solvers/BaseSecantSolver.java b/src/main/java/org/apache/commons/math/analysis/solvers/BaseSecantSolver.java
index b3a23a1d4..c781a9011 100644
--- a/src/main/java/org/apache/commons/math/analysis/solvers/BaseSecantSolver.java
+++ b/src/main/java/org/apache/commons/math/analysis/solvers/BaseSecantSolver.java
@@ -183,14 +183,7 @@ public abstract class BaseSecantSolver
                     f0 *= f1 / (f1 + fx);
                     break;
                 case REGULA_FALSI:
-                    if (x == x1) {
-                        final double delta = FastMath.max(rtol * FastMath.abs(x1),
-                                                          atol);
-                        // Update formula cannot make any progress: Update the
-                        // search interval.
-                        x0 = 0.5 * (x0 + x1 - delta);
-                        f0 = computeObjectiveValue(x0);
-                    }
+                    // Nothing.
                     break;
                 default:
                     // Should never happen.
diff --git a/src/test/java/org/apache/commons/math/analysis/solvers/RegulaFalsiSolverTest.java b/src/test/java/org/apache/commons/math/analysis/solvers/RegulaFalsiSolverTest.java
index df729f7b6..fea0abcc8 100644
--- a/src/test/java/org/apache/commons/math/analysis/solvers/RegulaFalsiSolverTest.java
+++ b/src/test/java/org/apache/commons/math/analysis/solvers/RegulaFalsiSolverTest.java
@@ -18,6 +18,7 @@
 package org.apache.commons.math.analysis.solvers;
 
 import org.apache.commons.math.analysis.UnivariateRealFunction;
+import org.apache.commons.math.exception.TooManyEvaluationsException;
 import org.junit.Test;
 import org.junit.Assert;
 
@@ -40,7 +41,7 @@ public final class RegulaFalsiSolverTest extends BaseSecantSolverAbstractTest {
         return new int[] {3, 7, 8, 19, 18, 11, 67, 55, 288, 151, -1};
     }
 
-    @Test
+    @Test(expected=TooManyEvaluationsException.class)
     public void testIssue631() {
         final UnivariateRealFunction f = new UnivariateRealFunction() {
                 /** {@inheritDoc} */