diff --git a/ReactCommon/react/renderer/attributedstring/AttributedString.cpp b/ReactCommon/react/renderer/attributedstring/AttributedString.cpp
index f4d4c4af987..b244d11b096 100644
--- a/ReactCommon/react/renderer/attributedstring/AttributedString.cpp
+++ b/ReactCommon/react/renderer/attributedstring/AttributedString.cpp
@@ -112,7 +112,7 @@ bool AttributedString::compareTextAttributesWithoutFrame(
     return false;
   }
 
-  for (unsigned i = 0; i < fragments_.size(); i++) {
+  for (size_t i = 0; i < fragments_.size(); i++) {
     if (fragments_[i].textAttributes != rhs.fragments_[i].textAttributes ||
         fragments_[i].string != rhs.fragments_[i].string) {
       return false;
@@ -135,7 +135,7 @@ bool AttributedString::isContentEqual(const AttributedString &rhs) const {
     return false;
   }
 
-  for (auto i = 0; i < fragments_.size(); i++) {
+  for (size_t i = 0; i < fragments_.size(); i++) {
     if (!fragments_[i].isContentEqual(rhs.fragments_[i])) {
       return false;
     }