diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
index 713283e..20d1fff 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/Clock.java
@@ -24,6 +24,7 @@
 import android.content.IntentFilter;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
+import android.icu.lang.UCharacter;
 import android.icu.text.DateTimePatternGenerator;
 import android.os.Bundle;
 import android.os.Handler;
@@ -472,7 +473,7 @@
                 if (a >= 0) {
                     // Move a back so any whitespace before AM/PM is also in the alternate size.
                     final int b = a;
-                    while (a > 0 && Character.isWhitespace(format.charAt(a-1))) {
+                    while (a > 0 && UCharacter.isUWhiteSpace(format.charAt(a - 1))) {
                         a--;
                     }
                     format = format.substring(0, a) + MAGIC1 + format.substring(a, b)