diff --git a/Source/Core/Core/HW/EXI/EXI_Channel.h b/Source/Core/Core/HW/EXI/EXI_Channel.h
index 2e2bb4347d..2ba54df5be 100644
--- a/Source/Core/Core/HW/EXI/EXI_Channel.h
+++ b/Source/Core/Core/HW/EXI/EXI_Channel.h
@@ -19,7 +19,7 @@ class Mapping;
 class CEXIChannel
 {
 public:
-  CEXIChannel(u32 channel_id);
+  explicit CEXIChannel(u32 channel_id);
   ~CEXIChannel();
 
   // get device