diff --git a/impagina b/impagina
index db2ad3e..2ff5337 100755
--- a/impagina
+++ b/impagina
@@ -22,6 +22,6 @@ while [ "$k" -lt $((n/2)) ]; do
 done
 
 # Output final pdf
-pdftk $inputMul4 cat $range output $outputImpaginato
+pdftk "$inputMul4" cat $range output "$outputImpaginato"
 
-rm "$empty" $inputMul4
+rm "$empty" "$inputMul4"