diff --git a/clipmenud b/clipmenud
index 22c100c..8fb3c00 100755
--- a/clipmenud
+++ b/clipmenud
@@ -116,12 +116,18 @@ while (( CM_ONESHOT )) || sleep "${CM_SLEEP:-0.5}"; do
 
         debug "New clipboard entry on $selection selection: \"$first_line\""
 
-        filename="$cache_dir/$(cksum <<< "$first_line")"
-        debug "Writing $data to $filename"
-        printf '%s' "$data" > "$filename"
+        # Without checking ${last_data[any]}, we often double write since both
+        # selections get the same content
+        if [[ ${last_data[any]} != "$data" ]]; then
+            filename="$cache_dir/$(cksum <<< "$first_line")"
+            debug "Writing $data to $filename"
+            printf '%s' "$data" > "$filename"
 
-        debug "Writing $first_line to $cache_file"
-        printf '%s\n' "$first_line" >> "$cache_file"
+            debug "Writing $first_line to $cache_file"
+            printf '%s\n' "$first_line" >> "$cache_file"
+        fi
+
+        last_data[any]=$data
 
         if (( CM_OWN_CLIPBOARD )) && [[ $selection != primary ]]; then
             # Take ownership of the clipboard, in case the original application