diff --git a/desmume/src/GPU.cpp b/desmume/src/GPU.cpp
index 7f222ce18..ba89d0c33 100755
--- a/desmume/src/GPU.cpp
+++ b/desmume/src/GPU.cpp
@@ -6914,7 +6914,7 @@ void GPUEngineBase::REG_DISPx_pack_test()
 {
 	const GPU_IOREG *r = this->_IORegisterMap;
 	
-	printf("%08lx %02x\n", (uintptr_t)r, (u32)((uintptr_t)(&r->DISPCNT) - (uintptr_t)r) );
+	printf("%p %02x\n", r, (u32)((uintptr_t)(&r->DISPCNT) - (uintptr_t)r) );
 	printf("\t%02x\n", (u32)((uintptr_t)(&r->DISPSTAT) - (uintptr_t)r) );
 	printf("\t%02x\n", (u32)((uintptr_t)(&r->VCOUNT) - (uintptr_t)r) );
 	printf("\t%02x\n", (u32)((uintptr_t)(&r->BGnCNT[GPULayerID_BG0]) - (uintptr_t)r) );
diff --git a/desmume/src/firmware.cpp b/desmume/src/firmware.cpp
index ee0c1cf83..0866bb128 100644
--- a/desmume/src/firmware.cpp
+++ b/desmume/src/firmware.cpp
@@ -1128,7 +1128,7 @@ bool NDS_ReadFirmwareDataFromFile(const char *fileName, NDSFirmwareData *outFirm
 		}
 		else
 		{
-			printf("Ext. Firmware: Failed to read the firmware data. (%lu out of %lu bytes read.)\n", (unsigned long)readBytes, sizeof(NDSFirmwareData));
+			printf("Ext. Firmware: Failed to read the firmware data. (%zu out of %zu bytes read.)\n", readBytes, sizeof(NDSFirmwareData));
 			result = false;
 		}
 	}
@@ -1148,7 +1148,7 @@ bool NDS_ReadFirmwareDataFromFile(const char *fileName, NDSFirmwareData *outFirm
 			}
 			else
 			{
-				printf("Ext. Firmware: Failed to read the console type. (%lu out of %lu bytes read.)\n", (unsigned long)readBytes, sizeof(FW_HEADER_KEY));
+				printf("Ext. Firmware: Failed to read the console type. (%zu out of %zu bytes read.)\n", readBytes, sizeof(FW_HEADER_KEY));
 				result = false;
 			}
 		}
@@ -1160,7 +1160,7 @@ bool NDS_ReadFirmwareDataFromFile(const char *fileName, NDSFirmwareData *outFirm
 			
 			if (readBytes != 6)
 			{
-				printf("Ext. Firmware: Failed to read the MAC address. (%lu out of %lu bytes read.)\n", (unsigned long)readBytes, sizeof(u8) * 6);
+				printf("Ext. Firmware: Failed to read the MAC address. (%zu out of %zu bytes read.)\n", readBytes, sizeof(u8) * 6);
 				result = false;
 			}
 		}