diff --git a/BasiliskII/src/cdrom.cpp b/BasiliskII/src/cdrom.cpp
index 2e2247d7..4a56607e 100644
--- a/BasiliskII/src/cdrom.cpp
+++ b/BasiliskII/src/cdrom.cpp
@@ -569,7 +569,7 @@ int16 CDROMControl(uint32 pb, uint32 dce)
 					WriteMacInt32(pb + csParam + 4, 1); // true/false = sync/async
 					break;
 				case FOURCC('c','d','3','d'):
-					WriteMacInt32(pb + csParam + 4, 1);
+					WriteMacInt32(pb + csParam + 4, 0);
 					break;
 			}
 			return noErr;
@@ -1023,7 +1023,7 @@ int16 CDROMStatus(uint32 pb, uint32 dce)
 					WriteMacInt32(pb + csParam + 4, 0);	// Drive not available for VM
 					break;
 				case FOURCC('c', 'd', '3', 'd'):
-					WriteMacInt16(pb + csParam + 4, 1);
+					WriteMacInt16(pb + csParam + 4, 0);
 					break;
 				default:
 					return statusErr;