diff --git a/java/src/org/openqa/selenium/internal/Require.java b/java/src/org/openqa/selenium/internal/Require.java
index 64c75432b1d89..d728a00d447c6 100644
--- a/java/src/org/openqa/selenium/internal/Require.java
+++ b/java/src/org/openqa/selenium/internal/Require.java
@@ -138,6 +138,9 @@ public static int positive(String argName, Integer number, String message) {
   }
 
   public static double positive(String argName, Double number, String message) {
+    if (number == null) {
+        throw new IllegalArgumentException(String.format(MUST_BE_SET, argName));
+    }
     if (number <= 0) {
       if (message == null) {
         throw new IllegalArgumentException(String.format(MUST_BE_POSITIVE, argName));