diff --git a/icu4c/source/common/unicode/urename.h b/icu4c/source/common/unicode/urename.h
index 6c7efb1e41..8102a17c54 100644
--- a/icu4c/source/common/unicode/urename.h
+++ b/icu4c/source/common/unicode/urename.h
@@ -23,7 +23,7 @@
 
 /* Uncomment the following line to disable renaming on platforms
    that do not use Autoconf. */
-/* #define U_DISABLE_RENAMING 1 /**/
+/* #define U_DISABLE_RENAMING 1 */
 
 #if !U_DISABLE_RENAMING
 
diff --git a/icu4c/source/tools/genren/genren.pl b/icu4c/source/tools/genren/genren.pl
index 7b5265e93b..f43031374d 100755
--- a/icu4c/source/tools/genren/genren.pl
+++ b/icu4c/source/tools/genren/genren.pl
@@ -83,7 +83,7 @@ print HEADER <<"EndOfHeaderComment";
 
 /* Uncomment the following line to disable renaming on platforms
    that do not use Autoconf. */
-/* #define U_DISABLE_RENAMING 1 /**/
+/* #define U_DISABLE_RENAMING 1 */
 
 #if !U_DISABLE_RENAMING
 EndOfHeaderComment