diff --git a/rpcs3/Emu/Cell/Modules/cellMic.cpp b/rpcs3/Emu/Cell/Modules/cellMic.cpp
index 67bd100321..3b083e8e03 100644
--- a/rpcs3/Emu/Cell/Modules/cellMic.cpp
+++ b/rpcs3/Emu/Cell/Modules/cellMic.cpp
@@ -133,7 +133,7 @@ void mic_context::load_config_and_init()
 		{
 		case microphone_handler::standard:
 		{
-			for (u32 index = 0; index < device_list.size(); index++)
+			for (s32 index = 0; index < static_cast<s32>(device_list.size()); index++)
 			{
 				mic_list.emplace(std::piecewise_construct, std::forward_as_tuple(index), std::forward_as_tuple(microphone_handler::standard));
 				mic_list.at(index).add_device(device_list[index]);
diff --git a/rpcs3/Emu/Cell/Modules/cellMic.h b/rpcs3/Emu/Cell/Modules/cellMic.h
index 72eb6e35cb..e6603c414f 100644
--- a/rpcs3/Emu/Cell/Modules/cellMic.h
+++ b/rpcs3/Emu/Cell/Modules/cellMic.h
@@ -353,7 +353,7 @@ public:
 
 	u64 event_queue_key = 0;
 
-	std::unordered_map<u8, microphone_device> mic_list;
+	std::unordered_map<s32, microphone_device> mic_list;
 
 	shared_mutex mutex;
 	atomic_t<u32> init = 0;