diff --git a/icu4c/source/common/ucnv_io.cpp b/icu4c/source/common/ucnv_io.cpp
index 94812cfd51d..5dd35d8a702 100644
--- a/icu4c/source/common/ucnv_io.cpp
+++ b/icu4c/source/common/ucnv_io.cpp
@@ -161,8 +161,6 @@
  *
  */
 
-U_NAMESPACE_BEGIN
-
 /**
  * Used by the UEnumeration API
  */
@@ -1339,8 +1337,6 @@ ucnv_swapAliases(const UDataSwapper *ds,
 #endif
 
 
-U_NAMESPACE_END
-
 /*
  * Hey, Emacs, please set the following:
  *