diff --git a/completions/zsh/_feedgnuplot b/completions/zsh/_feedgnuplot
index 1575c2d..5cdddda 100644
--- a/completions/zsh/_feedgnuplot
+++ b/completions/zsh/_feedgnuplot
@@ -36,7 +36,7 @@ _arguments -S
     '--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]'    \
-    '--hardcopy[Plot to a file]:new filename'                                         \
+    '--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]'                  \
     '(--rangesizeall)--extraValuesPerPoint[How many extra values are given for each data range]:N'\