diff --git a/bin/feedgnuplot b/bin/feedgnuplot
index 0864fda..07e5ee7 100755
--- a/bin/feedgnuplot
+++ b/bin/feedgnuplot
@@ -109,7 +109,7 @@ sub interpretCommandline
              'title=s', 'xlen=f', 'ymin=f', 'ymax=f', 'xmin=s', 'xmax=s', 'y2min=f', 'y2max=f',
              'zmin=f', 'zmax=f', 'y2=s@',
              'style=s{2}', 'curvestyle=s{2}', 'curvestyleall=s', 'styleall=s', 'with=s', 'extracmds=s@', 'set=s@', 'unset=s@',
-             'square!', 'square_xy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
+             'square!', 'square_xy!', 'square-xy!', 'squarexy!', 'hardcopy=s', 'maxcurves=i', 'monotonic!', 'timefmt=s',
              'equation=s@',
              'image=s',
              'histogram=s@', 'binwidth=f', 'histstyle=s',
@@ -143,6 +143,10 @@ sub interpretCommandline
     delete $options{styleall};
   }
 
+  # various square-xy synonyms
+  $options{'square_xy'} = 1 if $options{'square-xy'} || $options{'squarexy'};
+
+
   push @{$options{curvestyle}}, @{$options{style}};
   delete $options{style};
 
@@ -2005,7 +2009,7 @@ all 3 axes
 
 =item
 
-C<--square_xy>
+C<--square-xy>
 
 For 3D plots, set square aspect ratio for ONLY the x,y axes
 
diff --git a/completions/bash/feedgnuplot b/completions/bash/feedgnuplot
index 1cb7e3b..0509c6e 100644
--- a/completions/bash/feedgnuplot
+++ b/completions/bash/feedgnuplot
@@ -33,7 +33,7 @@ complete -W               \
     --monotonic           \
     --points              \
     --square              \
-    --square_xy           \
+    --square-xy           \
     --stream              \
     --terminal            \
     --timefmt             \
diff --git a/completions/zsh/_feedgnuplot b/completions/zsh/_feedgnuplot
index 3f57213..465a0f1 100644
--- a/completions/zsh/_feedgnuplot
+++ b/completions/zsh/_feedgnuplot
@@ -35,7 +35,7 @@ _arguments -S
     '*--equation[Raw symbolic equation]:equation'                                 \
     '--image[Image file to render beneath the data]:image:_files -g "(#i)*.(jpg|jpeg|png|gif)"' \
     '--square[Plot data with square aspect ratio]'                                \
-    '--square_xy[For 3D plots, set square aspect ratio for ONLY the x,y axes]'    \
+    '--square-xy[For 3D plots, set square aspect ratio for ONLY the x,y axes]'    \
     '--hardcopy[Plot to a file]:new image filename:_files -g "(#i)*.(jpg|jpeg|png|gif)"' \
     '--maxcurves[The maximum allowed number of curves]:number of curves'          \
     '(--3d)--monotonic[Resets plot if an X in the past is seen]'                  \