diff --git a/Source/Core/Core/Src/HW/GCMemcard.cpp b/Source/Core/Core/Src/HW/GCMemcard.cpp
index 2421e572ae..d320f0177a 100644
--- a/Source/Core/Core/Src/HW/GCMemcard.cpp
+++ b/Source/Core/Core/Src/HW/GCMemcard.cpp
@@ -43,12 +43,12 @@ GCMemcard::GCMemcard(const char *filename, bool forceCreation, bool sjis)
 		auto size = mcdFile.GetSize();
 		if (size < MC_FST_BLOCKS*BLOCK_SIZE)
 		{
-			PanicAlertT("%s failed to load as a memorycard \nfile is not large enough to be a valid memory card file (0x%x bytes)", filename, size);
+			PanicAlertT("%s failed to load as a memorycard \nfile is not large enough to be a valid memory card file (0x%x bytes)", filename, (unsigned) size);
 			return;
 		}
 		if (size % BLOCK_SIZE)
 		{
-			PanicAlertT("%s failed to load as a memorycard \n Card file size is invalid (0x%x bytes)", filename, size);
+			PanicAlertT("%s failed to load as a memorycard \n Card file size is invalid (0x%x bytes)", filename, (unsigned) size);
 				return;
 		}
 
@@ -63,7 +63,7 @@ GCMemcard::GCMemcard(const char *filename, bool forceCreation, bool sjis)
 			case MemCard2043Mb:
 				break;
 			default:
-				PanicAlertT("%s failed to load as a memorycard \n Card size is invalid (0x%x bytes)", filename, size);
+				PanicAlertT("%s failed to load as a memorycard \n Card size is invalid (0x%x bytes)", filename, (unsigned) size);
 				return;
 		}
 	}