diff --git a/icu4c/source/common/unicode/utext.h b/icu4c/source/common/unicode/utext.h
index eb99a519775..660994f6d20 100644
--- a/icu4c/source/common/unicode/utext.h
+++ b/icu4c/source/common/unicode/utext.h
@@ -1149,7 +1149,7 @@ struct UText {
 
     UBool           bPadding1, bPadding2, bPadding3;   /* pad UBools to 32 bit boudary */
 
-    int32_t         iPadding;                          /* pad int32 fields out to a 64 bit boudary.
+    int32_t         iPadding;                          /* pad int32 fields out to a 64 bit boudary. */
 
     /**
      * (public) Function pointer for UTextClone
diff --git a/icu4c/source/test/cintltst/reapits.c b/icu4c/source/test/cintltst/reapits.c
index 882d5e23f22..ed8479b415d 100644
--- a/icu4c/source/test/cintltst/reapits.c
+++ b/icu4c/source/test/cintltst/reapits.c
@@ -973,7 +973,7 @@ static void TestRegexCAPI(void) {
 
 }
 
-void TestBug4315() {
+void TestBug4315(void) {
     UErrorCode		theICUError = U_ZERO_ERROR;
     URegularExpression	*theRegEx;
     UChar           *textBuff;
diff --git a/icu4c/source/test/cintltst/utexttst.c b/icu4c/source/test/cintltst/utexttst.c
index 3d8f426e452..36c2fd28543 100644
--- a/icu4c/source/test/cintltst/utexttst.c
+++ b/icu4c/source/test/cintltst/utexttst.c
@@ -86,7 +86,7 @@ static void TestAPI(void) {
     /* utext_clone()  */
     {
         UChar   uString[]  = {0x41, 0x42, 0x43, 0};
-        int32_t len;
+        int64_t len;
         UText   *uta;
         UText   *utb;
 
@@ -108,9 +108,9 @@ static void TestAPI(void) {
         UChar     uString[]  = {0x41, 0x42, 0x43, 0};
         UText     *uta;
         UChar32   c;
-        int32_t   len;
+        int64_t   len;
         UBool     b;
-        int32_t   i;
+        int64_t   i;
 
         status = U_ZERO_ERROR;
         uta = utext_openUChars(NULL, uString, -1, &status);