diff --git a/icu4c/source/common/ucln.h b/icu4c/source/common/ucln.h
index cb3150dc65..afa40168f6 100644
--- a/icu4c/source/common/ucln.h
+++ b/icu4c/source/common/ucln.h
@@ -50,8 +50,8 @@
 typedef enum ECleanupLibraryType {
     UCLN_START = -1,
     UCLN_CUSTOM,    /* Custom is for anyone else. */
-    UCLN_LAYOUT,
     UCLN_LAYOUTEX,
+    UCLN_LAYOUT,
     UCLN_USTDIO,
     UCLN_I18N,
     UCLN_COMMON /* This must be the last one to cleanup. */