diff --git a/zsnes/src/uic.c b/zsnes/src/uic.c
index 67d95be3..7c8afd82 100644
--- a/zsnes/src/uic.c
+++ b/zsnes/src/uic.c
@@ -444,6 +444,8 @@ void DisplayBatteryStatus()
 
 // Make use of multiple mice.
 
+#ifndef __MSDOS__
+
 int MouseCount = 0;
 int Mouse1MoveX = 0;
 int Mouse2MoveX = 0;
@@ -533,3 +535,6 @@ void MultiMouseProcess(unsigned int mouse)
     }
   }
 }
+
+#endif
+
diff --git a/zsnes/src/video/procvid.asm b/zsnes/src/video/procvid.asm
index b73be0e8..171d8a29 100644
--- a/zsnes/src/video/procvid.asm
+++ b/zsnes/src/video/procvid.asm
@@ -155,6 +155,7 @@ NEWSYM processmouse1
     push ebx
     call Get_MouseData
     mov [mousebuttons],bx
+%ifndef __MSDOS__
     cmp byte[MouseCount],1
     jle .nomultimouse
     pushad
@@ -165,6 +166,7 @@ NEWSYM processmouse1
     mov dx,[Mouse1MoveY]
     jmp .mousestuff
 .nomultimouse
+%endif
     call Get_MousePositionDisplacement
 .mousestuff
     mov word[mousexpos],0
@@ -222,6 +224,7 @@ NEWSYM processmouse2
 .noautosw
     mov byte[ssautoswb],0
 .ss
+%ifndef __MSDOS__
     cmp byte[MouseCount],1
     jle .nomultimouse
     pushad
@@ -232,6 +235,7 @@ NEWSYM processmouse2
     mov dx,[Mouse2MoveY]
     jmp .mousestuff
 .nomultimouse
+%endif
     call Get_MousePositionDisplacement
 .mousestuff
     cmp byte[device2],3