diff --git a/icu4c/source/i18n/transreg.cpp b/icu4c/source/i18n/transreg.cpp
index de469072661..3441076334f 100644
--- a/icu4c/source/i18n/transreg.cpp
+++ b/icu4c/source/i18n/transreg.cpp
@@ -11,7 +11,7 @@
 */
 
 #include "unicode/utypes.h"
-#include <unicode/rep.h>
+#include "unicode/rep.h"
 
 #if !UCONFIG_NO_TRANSLITERATION