diff --git a/tools/bwa/mem/meta.yml b/tools/bwa/mem/meta.yml
index 1887cd38..2ea48a28 100644
--- a/tools/bwa/mem/meta.yml
+++ b/tools/bwa/mem/meta.yml
@@ -23,7 +23,7 @@ input:
         - index:
             type: file
             description: bwa indexes file
-            pattern: *.{fasta,fa}.{amb,ann,bwt,pac,sa}
+            pattern: *.{amb,ann,bwt,pac,sa}
         - prefix:
             type: val
             description: bwa index prefix, equivalent to index file names without extensions. Usually the reference genome file name unless otherwise specified.