diff --git a/src/derep_prefix.cc b/src/derep_prefix.cc
index 445e9ff6..5712f371 100644
--- a/src/derep_prefix.cc
+++ b/src/derep_prefix.cc
@@ -110,7 +110,7 @@ auto derep_compare_prefix(const void * a, const void * b) -> int
     }
 
   auto const result = std::strcmp(db_getheader(lhs->seqno_first),
-                                 db_getheader(rhs->seqno_first));
+                                  db_getheader(rhs->seqno_first));
   if (result != 0)
     {
       return result;