diff --git a/pages/common/qpdf.md b/pages/common/qpdf.md
index 70a997dc3e..244017509a 100644
--- a/pages/common/qpdf.md
+++ b/pages/common/qpdf.md
@@ -8,7 +8,7 @@
 
 - Merge (concatenate) a list of PDF files and save the result as another one:
 
-`qpdf --empty --pages {{file 1.pdf}} {{1,6-8}} --pages {{file 2.pdf}} {{3,4,5}} -- {{output.pdf}}`
+`qpdf --empty --pages {{file1.pdf}} {{1,6-8}} --pages {{file2.pdf}} {{3,4,5}} -- {{output.pdf}}`
 
 - Write each group of n pages to a separate output file with a given filename pattern: