diff --git a/core/src/main/java/org/elasticsearch/monitor/os/OsProbe.java b/core/src/main/java/org/elasticsearch/monitor/os/OsProbe.java
index 3322c05fc97..5ee2232068f 100644
--- a/core/src/main/java/org/elasticsearch/monitor/os/OsProbe.java
+++ b/core/src/main/java/org/elasticsearch/monitor/os/OsProbe.java
@@ -119,6 +119,9 @@ public class OsProbe {
             }
             // fallback
         }
+        if (Constants.WINDOWS) {
+            return null;
+        }
         if (getSystemLoadAverage == null) {
             return null;
         }
diff --git a/core/src/test/java/org/elasticsearch/monitor/os/OsProbeTests.java b/core/src/test/java/org/elasticsearch/monitor/os/OsProbeTests.java
index 5aa1899c61d..2edaad5c4ba 100644
--- a/core/src/test/java/org/elasticsearch/monitor/os/OsProbeTests.java
+++ b/core/src/test/java/org/elasticsearch/monitor/os/OsProbeTests.java
@@ -55,11 +55,7 @@ public class OsProbeTests extends ESTestCase {
         }
         if (Constants.WINDOWS) {
             // load average is unavailable on Windows
-            if (loadAverage != null) {
-                assertThat(loadAverage[0], equalTo((double) -1));
-                assertThat(loadAverage[1], equalTo((double) -1));
-                assertThat(loadAverage[2], equalTo((double) -1));
-            }
+            assertNull(loadAverage);
         } else if (Constants.LINUX) {
             // we should be able to get the load average
             assertNotNull(loadAverage);