diff --git a/pcsx2/USB/usb-mic/audiodev-wasapi.cpp b/pcsx2/USB/usb-mic/audiodev-wasapi.cpp
index fe772ea94e..12fdd1f82c 100644
--- a/pcsx2/USB/usb-mic/audiodev-wasapi.cpp
+++ b/pcsx2/USB/usb-mic/audiodev-wasapi.cpp
@@ -649,6 +649,7 @@ namespace usb_mic
 				samples_to_read -= samples;
 			}
 
+			resMutex = ReleaseMutex(mMutex);
 			return (outFrames - (samples_to_read / mDeviceChannels));
 		}