diff --git a/core/ustring.cpp b/core/ustring.cpp
index 685514298..0b8d4d74a 100644
--- a/core/ustring.cpp
+++ b/core/ustring.cpp
@@ -1230,14 +1230,14 @@ bool String::is_word_at(const int index, const char *p_str) const {
 
 	int i = 0;
 
-	while (p_str[i] != '\0') {
+	while (str[i] != '\0') {
 		int iind = index + i;
 
 		if (iind >= size) {
 			return false;
 		}
 
-		if (operator[](iind) != p_str[i]) {
+		if (operator[](iind) != (CharType)str[i]) {
 			return false;
 		}
 
@@ -1258,7 +1258,7 @@ bool String::is_word_at(const int index, const String &p_str) const {
 	for (int i = 0; i < p_str.length(); ++i) {
 		int iind = index + i;
 
-		if (operator[](iind) != p_str[i]) {
+		if (operator[](iind) != (CharType)p_str[i]) {
 			return false;
 		}
 	}