diff --git a/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreHighPrecisionRuleFactory.java b/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreHighPrecisionRuleFactory.java
index 09c580044..dda844355 100644
--- a/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreHighPrecisionRuleFactory.java
+++ b/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreHighPrecisionRuleFactory.java
@@ -62,6 +62,8 @@ public class LegendreHighPrecisionRuleFactory extends BaseRuleFactory<BigDecimal
 
     /**
      * {@inheritDoc}
+     *
+     * @throws NotStrictlyPositiveException if {@code numberOfPoints < 1}.
      */
     @Override
     protected Pair<BigDecimal[], BigDecimal[]> computeRule(int numberOfPoints) {
diff --git a/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreRuleFactory.java b/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreRuleFactory.java
index a794acce9..cc3e16270 100644
--- a/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreRuleFactory.java
+++ b/src/main/java/org/apache/commons/math3/analysis/integration/gauss/LegendreRuleFactory.java
@@ -34,6 +34,8 @@ import org.apache.commons.math3.exception.util.LocalizedFormats;
 public class LegendreRuleFactory extends BaseRuleFactory<Double> {
     /**
      * {@inheritDoc}
+     *
+     * @throws NotStrictlyPositiveException if {@code numberOfPoints < 1}.
      */
     @Override
     protected Pair<Double[], Double[]> computeRule(int numberOfPoints) {