diff --git a/src/mame/drivers/cojag.c b/src/mame/drivers/cojag.c
index 62ff15f736f..a3d87c7992a 100644
--- a/src/mame/drivers/cojag.c
+++ b/src/mame/drivers/cojag.c
@@ -1250,7 +1250,7 @@ ROM_START( area51mx )	/* 68020 based, Labeled as "68020 MAX/A51 KIT 2.0" Date: A
 	ROM_LOAD32_BYTE( "area51mx.3k", 0x00003, 0x80000, CRC(0e78f308) SHA1(adc4c8e441eb8fe525d0a6220eb3a2a8791a7289) )
 
 	DISK_REGION( "ide" )
-	DISK_IMAGE( "area51mx", 0, MD5(fce1a0954759fa22e50747959716823d) SHA1(7e629045eb5baa8cd522273befffbf8520828938) )
+	DISK_IMAGE( "area51mx", 0, SHA1(5ff10f4e87094d4449eabf3de7549564ca568c7e) )
 ROM_END
 
 
@@ -1262,7 +1262,7 @@ ROM_START( a51mxr3k ) /* R3000 based, Labeled as "R3K Max/A51 Kit Ver 1.0" */
 	ROM_LOAD32_BYTE( "a51mxr3k.ll", 0x00003, 0x80000, CRC(ece9e5ae) SHA1(7e44402726f5afa6d1670b27aa43ad13d21c4ad9) )
 
 	DISK_REGION( "ide" )
-	DISK_IMAGE( "area51mx", 0, MD5(fce1a0954759fa22e50747959716823d) SHA1(7e629045eb5baa8cd522273befffbf8520828938) )
+	DISK_IMAGE( "area51mx", 0, SHA1(5ff10f4e87094d4449eabf3de7549564ca568c7e) )
 ROM_END