diff --git a/icu4c/source/tools/toolutil/xmlparser.cpp b/icu4c/source/tools/toolutil/xmlparser.cpp
index a9df760b82..68097d4117 100644
--- a/icu4c/source/tools/toolutil/xmlparser.cpp
+++ b/icu4c/source/tools/toolutil/xmlparser.cpp
@@ -21,9 +21,6 @@
 #include "filestrm.h"
 #include "xmlparser.h"
 
-UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLParser)
-UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLElement)
-
 // character constants
 enum {
     x_QUOT=0x22,
@@ -48,6 +45,11 @@ enum {
 //  XML #6
 #define  XML_NAME    XML_NAMESTARTCHAR "(?:" XML_NAMECHAR ")*"
 
+U_NAMESPACE_BEGIN
+
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLParser)
+UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UXMLElement)
+
 //
 //   UXMLParser constructor.   Mostly just initializes the ICU regexes that are
 //                             used for parsing.
@@ -809,3 +811,5 @@ UXMLElement::getChildElement(const UnicodeString &name) const {
     }
     return NULL;
 }
+
+U_NAMESPACE_END
diff --git a/icu4c/source/tools/toolutil/xmlparser.h b/icu4c/source/tools/toolutil/xmlparser.h
index 483333a198..0ab7483008 100644
--- a/icu4c/source/tools/toolutil/xmlparser.h
+++ b/icu4c/source/tools/toolutil/xmlparser.h
@@ -36,6 +36,10 @@ enum UXMLNodeType {
     UXML_NODE_TYPE_COUNT
 };
 
+U_NAMESPACE_BEGIN
+
+class UXMLParser;
+
 /**
  * This class represents an element node in a parsed XML tree.
  */
@@ -153,7 +157,7 @@ private:
  * The parse methods parse whole documents and return the parse trees via their
  * root elements.
  */
-class  U_TOOLUTIL_API UXMLParser : public UObject {
+class U_TOOLUTIL_API UXMLParser : public UObject {
 public:
     /**
      * Create an XML parser.
@@ -233,4 +237,6 @@ private:
     UnicodeString         fOneLF;
 };
 
+U_NAMESPACE_END
+
 #endif