diff --git a/ICUMatcher.m b/ICUMatcher.m
index 1ee6d588..de7812f5 100644
--- a/ICUMatcher.m
+++ b/ICUMatcher.m
@@ -106,7 +106,7 @@ -(NSString *)groupAtIndex:(unsigned)groupIndex {
 	while(YES) { 
 		UErrorCode status = 0;
 		UChar *dest = (UChar *)NSZoneCalloc([self zone], groupSize, sizeof(UChar));
-		int32_t buffSize = uregex_group(re, groupIndex, dest, groupSize, &status);
+		int32_t buffSize = uregex_group(re, groupIndex, dest, (int32_t)groupSize, &status);
 
 		if(U_BUFFER_OVERFLOW_ERROR == status) {
 			groupSize *= 2;
@@ -167,9 +167,9 @@ -(NSString *)performReplacementWithString:(NSString *)aReplacementString replace
 	
 		status = 0;
 		if(replacingAll)
-			resultLength = uregex_replaceAll(re, replacementText, -1, destString, destStringBufferSize, &status);
+			resultLength = uregex_replaceAll(re, replacementText, -1, destString, (int32_t)destStringBufferSize, &status);
 		else
-			resultLength = uregex_replaceFirst(re, replacementText, -1, destString, destStringBufferSize, &status);
+			resultLength = uregex_replaceFirst(re, replacementText, -1, destString, (int32_t)destStringBufferSize, &status);
 
 		// realloc some more space if possible
 		if(status == U_BUFFER_OVERFLOW_ERROR) {
diff --git a/ICUPattern.m b/ICUPattern.m
index 5191358a..10a85817 100644
--- a/ICUPattern.m
+++ b/ICUPattern.m
@@ -198,7 +198,7 @@ -(NSArray *)componentsSplitFromString:(NSString *)stringToSplit
 		UChar *destFields[destFieldsCapacity];
 		int numberOfComponents = uregex_split([self re],
 											  destBuf,
-											  destCapacity,
+											  (int32_t)destCapacity,
 											  &requiredCapacity,
 											  destFields,
 											  destFieldsCapacity,