diff --git a/backend/avision.c b/backend/avision.c
index 862a27565..b70278df4 100644
--- a/backend/avision.c
+++ b/backend/avision.c
@@ -58,7 +58,7 @@
    Copyright 2010, 2011 by
                 "Mike Kelly" <mike@piratehaven.org>
 
-   Additional Contributers:
+   Additional Contributors:
                 "Gunter Wagner"
                   (some fixes and the transparency option)
                 "Martin Jelínek" <mates@sirrah.troja.mff.cuni.cz>
@@ -4880,7 +4880,7 @@ send_tune_scan_length (Avision_Scanner* s)
   set_double (payload.vertical, top);
   /* set_double (payload.horizontal, 0); */
 
-  /* we alway send it, even for 0 as the scanner keeps it in RAM and
+  /* we always send it, even for 0 as the scanner keeps it in RAM and
      previous runs could already have set something */
 
   status = avision_cmd (&s->av_con, &scmd, sizeof (scmd),
@@ -6266,7 +6266,7 @@ set_window (Avision_Scanner* s)
   cmd.window.avision.highlight = 0xFF;
   cmd.window.avision.shadow = 0x00;
 
-  /* mode dependant settings */
+  /* mode dependent settings */
   switch (s->c_mode)
     {
     case AV_THRESHOLDED:
diff --git a/backend/avision.h b/backend/avision.h
index 9017bf22d..309509fff 100644
--- a/backend/avision.h
+++ b/backend/avision.h
@@ -120,7 +120,7 @@ typedef struct Avision_HWEntry {
     /* if the scan area and resolution needs to be forced for films */
   #define AV_FORCE_FILM ((uint64_t)1<<6)
 
-    /* does not suport, or very broken background (added for AV610C2) */
+    /* does not support, or very broken background (added for AV610C2) */
   #define AV_NO_BACKGROUND ((uint64_t)1<<7)
 
     /* is film scanner - no detection yet */
@@ -171,7 +171,7 @@ typedef struct Avision_HWEntry {
     /* though marked as GRAY only the scanner can do GRAY modes */
   #define AV_GRAY_MODES ((uint64_t)1<<23)
 
-    /* no seperate, single REAR scan (AV122, DM152, ...) */
+    /* no separate, single REAR scan (AV122, DM152, ...) */
   #define AV_NO_REAR ((uint64_t)1<<24)
 
     /* only scan with some known good hardware resolutions, as the
@@ -180,11 +180,11 @@ typedef struct Avision_HWEntry {
        interpolate to all the others */
   #define AV_SOFT_SCALE ((uint64_t)1<<25)
 
-    /* does keep window though it does not advertice it - the AV122/DM152
+    /* does keep window though it does not advertise it - the AV122/DM152
        mess up image data if window is resend between ADF pages */
   #define AV_DOES_KEEP_WINDOW ((uint64_t)1<<26)
 
-    /* does keep gamma though it does not advertice it */
+    /* does keep gamma though it does not advertise it */
   #define AV_DOES_KEEP_GAMMA ((uint64_t)1<<27)
 
     /* does the scanner contain a Cancel button? */
@@ -463,12 +463,12 @@ typedef struct Avision_Device
   int scsi_buffer_size; /* nice to have SCSI buffer size */
   int read_stripe_size; /* stripes to be read at-a-time */
 
-  /* film scanner atributes - maybe these should be in the scanner struct? */
+  /* film scanner attributes - maybe these should be in the scanner struct? */
   SANE_Range frame_range;
   SANE_Word current_frame;
   SANE_Word holder_type;
 
-  /* some versin corrections */
+  /* some version corrections */
   uint16_t data_dq; /* was ox0A0D - but hangs some new scanners */
 
   Avision_HWEntry* hw;
@@ -773,7 +773,7 @@ typedef struct calibration_format
   uint16_t g_dark_shading_target;
   uint16_t b_dark_shading_target;
 
-  /* not returned but usefull in some places */
+  /* not returned but useful in some places */
   uint8_t channels;
 } calibration_format;