diff --git a/esphome/components/api/api_pb2.cpp b/esphome/components/api/api_pb2.cpp
index e69654067b6..a4324b8db3f 100644
--- a/esphome/components/api/api_pb2.cpp
+++ b/esphome/components/api/api_pb2.cpp
@@ -1039,7 +1039,7 @@ bool HomeAssistantStateResponse::decode_length(uint32_t field_id, ProtoLengthDel
 bool DSTRule::decode_varint(uint32_t field_id, proto_varint_value_t value) {
   switch (field_id) {
     case 1:
-      this->time_seconds = decode_zigzag32(value);
+      this->time_seconds = decode_zigzag32(static_cast<uint32_t>(value));
       break;
     case 2:
       this->day = value;
@@ -1064,10 +1064,10 @@ bool DSTRule::decode_varint(uint32_t field_id, proto_varint_value_t value) {
 bool ParsedTimezone::decode_varint(uint32_t field_id, proto_varint_value_t value) {
   switch (field_id) {
     case 1:
-      this->std_offset_seconds = decode_zigzag32(value);
+      this->std_offset_seconds = decode_zigzag32(static_cast<uint32_t>(value));
       break;
     case 2:
-      this->dst_offset_seconds = decode_zigzag32(value);
+      this->dst_offset_seconds = decode_zigzag32(static_cast<uint32_t>(value));
       break;
     default:
       return false;
@@ -1147,13 +1147,13 @@ bool ExecuteServiceArgument::decode_varint(uint32_t field_id, proto_varint_value
       this->legacy_int = static_cast<int32_t>(value);
       break;
     case 5:
-      this->int_ = decode_zigzag32(value);
+      this->int_ = decode_zigzag32(static_cast<uint32_t>(value));
       break;
     case 6:
       this->bool_array.push_back(value != 0);
       break;
     case 7:
-      this->int_array.push_back(decode_zigzag32(value));
+      this->int_array.push_back(decode_zigzag32(static_cast<uint32_t>(value)));
       break;
     default:
       return false;
diff --git a/script/api_protobuf/api_protobuf.py b/script/api_protobuf/api_protobuf.py
index 1c2a3e5cc2f..b4044c362c6 100755
--- a/script/api_protobuf/api_protobuf.py
+++ b/script/api_protobuf/api_protobuf.py
@@ -1262,7 +1262,7 @@ class SFixed64Type(TypeInfo):
 class SInt32Type(TypeInfo):
     cpp_type = "int32_t"
     default_value = "0"
-    decode_varint = "decode_zigzag32(value)"
+    decode_varint = "decode_zigzag32(static_cast<uint32_t>(value))"
     encode_func = "encode_sint32"
     wire_type = WireType.VARINT  # Uses wire type 0