diff --git a/packages/react-native/ReactCommon/react/renderer/core/RawPropsParser.cpp b/packages/react-native/ReactCommon/react/renderer/core/RawPropsParser.cpp
index 2aafcbd036eac6..f03d8060c92fb7 100644
--- a/packages/react-native/ReactCommon/react/renderer/core/RawPropsParser.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/core/RawPropsParser.cpp
@@ -33,7 +33,7 @@ const RawValue* RawPropsParser::at(
     // 4950 lookups and equality checks on initialization of the parser, which
     // happens exactly once per component.
     size_t size = keys_.size();
-    for (int i = 0; i < size; i++) {
+    for (size_t i = 0; i < size; i++) {
       if (keys_[i] == key) {
         return nullptr;
       }
@@ -69,7 +69,8 @@ const RawValue* RawPropsParser::at(
   do {
     rawProps.keyIndexCursor_++;
 
-    if (UNLIKELY(rawProps.keyIndexCursor_ >= keys_.size())) {
+    if (UNLIKELY(
+            static_cast<size_t>(rawProps.keyIndexCursor_) >= keys_.size())) {
 #ifdef REACT_NATIVE_DEBUG
       if (resetLoop) {
         LOG(ERROR)
diff --git a/packages/react-native/ReactCommon/react/renderer/core/ShadowNode.cpp b/packages/react-native/ReactCommon/react/renderer/core/ShadowNode.cpp
index 641b6d26546b95..d51cb8ff2311a1 100644
--- a/packages/react-native/ReactCommon/react/renderer/core/ShadowNode.cpp
+++ b/packages/react-native/ReactCommon/react/renderer/core/ShadowNode.cpp
@@ -243,7 +243,7 @@ void ShadowNode::replaceChild(
   auto& children = const_cast<ShadowNode::ListOfShared&>(*children_);
   auto size = children.size();
 
-  if (suggestedIndex != -1 && suggestedIndex < size) {
+  if (suggestedIndex != -1 && static_cast<size_t>(suggestedIndex) < size) {
     // If provided `suggestedIndex` is accurate,
     // replacing in place using the index.
     if (children.at(suggestedIndex).get() == &oldChild) {