diff --git a/icu4c/source/test/intltest/dcfmapts.cpp b/icu4c/source/test/intltest/dcfmapts.cpp
index d0b803e2b2b..b4c682801dd 100644
--- a/icu4c/source/test/intltest/dcfmapts.cpp
+++ b/icu4c/source/test/intltest/dcfmapts.cpp
@@ -20,6 +20,7 @@
 
 #include "putilimp.h"
 #include "plurrule_impl.h"
+#include <stdio.h>
 
 #define LENGTHOF(array) ((int32_t)(sizeof(array)/sizeof((array)[0])))