diff --git a/icu4c/source/data/locales/af.txt b/icu4c/source/data/locales/af.txt
index 6545c498f3e..971c91b118b 100644
--- a/icu4c/source/data/locales/af.txt
+++ b/icu4c/source/data/locales/af.txt
@@ -9,8 +9,8 @@ af {
     Version { "4.0" }
 
     AmPmMarkers { 
-        "VM",
-        "NM",
+        "vm",
+        "nm"
     }
     Countries {
         //Fallback{ "en" }