diff --git a/tools/emboss/emboss_fuzztran.xml b/tools/emboss/emboss_fuzztran.xml
index dcbaad58d6a..deac37ce4cd 100644
--- a/tools/emboss/emboss_fuzztran.xml
+++ b/tools/emboss/emboss_fuzztran.xml
@@ -1,6 +1,6 @@
 <tool id="EMBOSS: fuzztran39" name="fuzztran">
   <description>Protein pattern search after translation</description>
-  <command>fuzztran -sequence $input1 -outfile $out_file1 -pattern "$pattern" -mismatch $mismatch -frame $frame -table $table -rformat2 $out_format1 -auto</command>
+  <command>fuzztran -sequence $input1 -outfile $out_file1 -pattern "$pattern" -pmismatch $mismatch -frame $frame -table $table -rformat2 $out_format1 -auto</command>
   <inputs>
     <param format="fasta" name="input1" type="data">
       <label>Sequences</label>