diff --git a/icu4c/source/test/cintltst/utexttst.c b/icu4c/source/test/cintltst/utexttst.c
index 4f9442d4f16..fbbe09e8730 100644
--- a/icu4c/source/test/cintltst/utexttst.c
+++ b/icu4c/source/test/cintltst/utexttst.c
@@ -88,7 +88,7 @@ static void TestAPI(void) {
     /* utext_clone()  */
     {
         UChar   uString[]  = {0x41, 0x42, 0x43, 0};
-        int     len;
+        int32_t len;
         UText   *uta;
         UText   *utb;