diff --git a/src/java/org/apache/commons/lang/math/DoubleRange.java b/src/java/org/apache/commons/lang/math/DoubleRange.java
index 8c62075cd..cafa2949c 100644
--- a/src/java/org/apache/commons/lang/math/DoubleRange.java
+++ b/src/java/org/apache/commons/lang/math/DoubleRange.java
@@ -398,13 +398,15 @@ public final class DoubleRange extends Range implements Serializable {
      */
     @Override
     public int hashCode() {
-        if (hashCode == 0) {
-            hashCode = 17;
-            hashCode = 37 * hashCode + getClass().hashCode();
+        int temp = hashCode;
+        if (temp == 0) {
+            temp = 17;
+            temp = 37 * temp + getClass().hashCode();
             long lng = Double.doubleToLongBits(min);
-            hashCode = 37 * hashCode + ((int) (lng ^ (lng >> 32)));
+            temp = 37 * temp + ((int) (lng ^ (lng >> 32)));
             lng = Double.doubleToLongBits(max);
-            hashCode = 37 * hashCode + ((int) (lng ^ (lng >> 32)));
+            temp = 37 * temp + ((int) (lng ^ (lng >> 32)));
+            hashCode = temp;
         }
         return hashCode;
     }
diff --git a/src/java/org/apache/commons/lang/math/FloatRange.java b/src/java/org/apache/commons/lang/math/FloatRange.java
index d22c7018e..4472aa620 100644
--- a/src/java/org/apache/commons/lang/math/FloatRange.java
+++ b/src/java/org/apache/commons/lang/math/FloatRange.java
@@ -394,11 +394,13 @@ public final class FloatRange extends Range implements Serializable {
      */
     @Override
     public int hashCode() {
-        if (hashCode == 0) {
-            hashCode = 17;
-            hashCode = 37 * hashCode + getClass().hashCode();
-            hashCode = 37 * hashCode + Float.floatToIntBits(min);
-            hashCode = 37 * hashCode + Float.floatToIntBits(max);
+        int temp = hashCode;
+        if (temp == 0) {
+            temp = 17;
+            temp = 37 * temp + getClass().hashCode();
+            temp = 37 * temp + Float.floatToIntBits(min);
+            temp = 37 * temp + Float.floatToIntBits(max);
+            hashCode = temp;
         }
         return hashCode;
     }
diff --git a/src/java/org/apache/commons/lang/math/IntRange.java b/src/java/org/apache/commons/lang/math/IntRange.java
index fb5155d8d..e8b84ce65 100644
--- a/src/java/org/apache/commons/lang/math/IntRange.java
+++ b/src/java/org/apache/commons/lang/math/IntRange.java
@@ -368,11 +368,13 @@ public final class IntRange extends Range implements Serializable {
      */
     @Override
     public int hashCode() {
-        if (hashCode == 0) {
-            hashCode = 17;
-            hashCode = 37 * hashCode + getClass().hashCode();
-            hashCode = 37 * hashCode + min;
-            hashCode = 37 * hashCode + max;
+        int temp = hashCode;
+        if (temp == 0) {
+            temp = 17;
+            temp = 37 * temp + getClass().hashCode();
+            temp = 37 * temp + min;
+            temp = 37 * temp + max;
+            hashCode = temp;
         }
         return hashCode;
     }
diff --git a/src/java/org/apache/commons/lang/math/LongRange.java b/src/java/org/apache/commons/lang/math/LongRange.java
index 971351522..51bd6c778 100644
--- a/src/java/org/apache/commons/lang/math/LongRange.java
+++ b/src/java/org/apache/commons/lang/math/LongRange.java
@@ -381,11 +381,13 @@ public final class LongRange extends Range implements Serializable {
      */
     @Override
     public int hashCode() {
-        if (hashCode == 0) {
-            hashCode = 17;
-            hashCode = 37 * hashCode + getClass().hashCode();
-            hashCode = 37 * hashCode + ((int) (min ^ (min >> 32)));
-            hashCode = 37 * hashCode + ((int) (max ^ (max >> 32)));
+        int temp = hashCode;
+        if (temp == 0) {
+            temp = 17;
+            temp = 37 * temp + getClass().hashCode();
+            temp = 37 * temp + ((int) (min ^ (min >> 32)));
+            temp = 37 * temp + ((int) (max ^ (max >> 32)));
+            hashCode = temp;
         }
         return hashCode;
     }
diff --git a/src/java/org/apache/commons/lang/math/NumberRange.java b/src/java/org/apache/commons/lang/math/NumberRange.java
index f74a00cd5..beff6f8f3 100644
--- a/src/java/org/apache/commons/lang/math/NumberRange.java
+++ b/src/java/org/apache/commons/lang/math/NumberRange.java
@@ -215,11 +215,13 @@ public final class NumberRange extends Range implements Serializable {
      */
     @Override
     public int hashCode() {
-        if (hashCode == 0) {
-            hashCode = 17;
-            hashCode = 37 * hashCode + getClass().hashCode();
-            hashCode = 37 * hashCode + min.hashCode();
-            hashCode = 37 * hashCode + max.hashCode();
+        int temp = hashCode;
+        if (temp == 0) {
+            temp = 17;
+            temp = 37 * temp + getClass().hashCode();
+            temp = 37 * temp + min.hashCode();
+            temp = 37 * temp + max.hashCode();
+            hashCode = temp;
         }
         return hashCode;
     }