diff --git a/base/services/w32time/register.c b/base/services/w32time/register.c
index 205a288bb04..f47e2a01e23 100644
--- a/base/services/w32time/register.c
+++ b/base/services/w32time/register.c
@@ -236,7 +236,7 @@ SetNtpClientValues(VOID)
         goto done;
     }
 
-    dwValue = 0x00093a80;
+    dwValue = W32TIME_POLL_INTERVAL;
     dwError = RegSetValueExW(hKey,
                              L"SpecialPollInterval",
                              0,
diff --git a/base/services/w32time/w32time.c b/base/services/w32time/w32time.c
index 0d5508a7b2c..f6a38c871c9 100644
--- a/base/services/w32time/w32time.c
+++ b/base/services/w32time/w32time.c
@@ -153,7 +153,7 @@ GetIntervalSetting(VOID)
     }
 
     if (lRet != ERROR_SUCCESS || dwData < 120)
-        return 9 * 60 * 60; // 9 hours, because Windows uses 9 hrs, 6 mins and 8 seconds by default.
+        return W32TIME_POLL_INTERVAL;
     else
         return dwData;
 }
diff --git a/base/services/w32time/w32time.h b/base/services/w32time/w32time.h
index 0bd729e6d6f..dcbb10a6f68 100644
--- a/base/services/w32time/w32time.h
+++ b/base/services/w32time/w32time.h
@@ -16,6 +16,7 @@
 
 #define MAX_VALUE_NAME 16383
 #define NTPPORT 123
+#define W32TIME_POLL_INTERVAL (4 * 60 * 60) // 4 hours.
 
 
 /* ntpclient.c */