diff --git a/backend/ibm.c b/backend/ibm.c
index 1f2622661..25bc47451 100644
--- a/backend/ibm.c
+++ b/backend/ibm.c
@@ -192,7 +192,7 @@ attach (const char *devnam, Ibm_Device ** devp)
       status = object_position (fd, OBJECT_POSITION_UNLOAD);
       if (status != SANE_STATUS_GOOD)
     	{
-	  DBG (1, "attach: OBJECT POSTITION failed\n");
+	  DBG (1, "attach: OBJECT POSITION failed\n");
 	  sanei_scsi_close (fd);
 	  return (SANE_STATUS_INVAL);
     	}
@@ -269,7 +269,7 @@ attach (const char *devnam, Ibm_Device ** devp)
   dev->info.yres_default = _2btol(wbuf.y_res);
   dev->info.image_mode_default = wbuf.image_comp;
 
-  /* if you throw the MRIF bit the brighness control reverses too */
+  /* if you throw the MRIF bit the brightness control reverses too */
   /* so I reverse the reversal in software for symmetry's sake */
   /* I should make this into an option */
 
@@ -521,7 +521,7 @@ do_cancel (Ibm_Scanner * s)
   status = object_position (s->fd, OBJECT_POSITION_UNLOAD);
   if (status != SANE_STATUS_GOOD)
     {
-      DBG (1, "cancel: OBJECT POSTITION failed\n");
+      DBG (1, "cancel: OBJECT POSITION failed\n");
     }
 
   s->scanning = SANE_FALSE;
@@ -996,7 +996,7 @@ sane_start (SANE_Handle handle)
   _lto4b(s->length, wbuf.length);
 
   wbuf.image_comp = s->image_composition;
-  /* if you throw the MRIF bit the brighness control reverses too */
+  /* if you throw the MRIF bit the brightness control reverses too */
   /* so I reverse the reversal in software for symmetry's sake */
   if (wbuf.image_comp == IBM_GRAYSCALE || wbuf.image_comp == IBM_DITHERED_MONOCHROME)
     {