diff --git a/src/gb/GB.cpp b/src/gb/GB.cpp
index 50521104..8769edcd 100644
--- a/src/gb/GB.cpp
+++ b/src/gb/GB.cpp
@@ -608,6 +608,8 @@ bool gbIsGameboyRom(char * file)
     char * p = strrchr(file,'.');
 
     if(p != NULL) {
+      if(_stricmp(p, ".dmg") == 0)
+        return true;
       if(_stricmp(p, ".gb") == 0)
         return true;
       if(_stricmp(p, ".gbc") == 0)
diff --git a/src/win32/BIOSDialog.cpp b/src/win32/BIOSDialog.cpp
index 040a3c89..f3a0a046 100644
--- a/src/win32/BIOSDialog.cpp
+++ b/src/win32/BIOSDialog.cpp
@@ -95,7 +95,7 @@ void BIOSDialog::OnBnClickedSelectGbcBiosPath()
 		NULL,
 		current,
 		OFN_DONTADDTORECENT | OFN_FILEMUSTEXIST,
-		_T("BIOS Files (*.bin;*.gbc)|*.bin;*.gbc|All Files (*.*)|*.*||"),
+		_T("BIOS Files (*.bin;*.cgb;*.gbc)|*.bin;*.cgb;*.gbc|All Files (*.*)|*.*||"),
 		this,
 		0 );