diff --git a/cache/filter.go b/cache/filter.go
index b26e7ae164ba4f1ff84dc15b72428052e9caf312..27e92cf33c24a588a4b5829e45afaf842d431f6d 100644
--- a/cache/filter.go
+++ b/cache/filter.go
@@ -33,8 +33,7 @@ func AuthorFilter(query string) Filter {
 				panic("missing identity in the cache")
 			}
 
-			return strings.Contains(strings.ToLower(author.Name), query) ||
-				strings.Contains(strings.ToLower(author.Login), query)
+			return author.Match(query)
 		}
 
 		// Legacy identity support
@@ -66,9 +65,7 @@ func ActorFilter(query string) Filter {
 				panic("missing identity in the cache")
 			}
 
-			if query == identityExcerpt.Id ||
-				strings.Contains(strings.ToLower(identityExcerpt.Name), query) ||
-				query == strings.ToLower(identityExcerpt.Login) {
+			if identityExcerpt.Match(query) {
 				return true
 			}
 		}
@@ -87,9 +84,7 @@ func ParticipantFilter(query string) Filter {
 				panic("missing identity in the cache")
 			}
 
-			if query == identityExcerpt.Id ||
-				strings.Contains(strings.ToLower(identityExcerpt.Name), query) ||
-				query == strings.ToLower(identityExcerpt.Login) {
+			if identityExcerpt.Match(query) {
 				return true
 			}
 		}
diff --git a/cache/identity_excerpt.go b/cache/identity_excerpt.go
index 2a13bc60deed462f6a2882b9eb9fe8bc3d07b975..3ac1390367312842ce2d31b0179cd3b05f7515a1 100644
--- a/cache/identity_excerpt.go
+++ b/cache/identity_excerpt.go
@@ -3,6 +3,7 @@ package cache
 import (
 	"encoding/gob"
 	"fmt"
+	"strings"
 
 	"github.com/MichaelMure/git-bug/identity"
 )
@@ -51,6 +52,13 @@ func (i *IdentityExcerpt) DisplayName() string {
 	panic("invalid person data")
 }
 
+// Match matches a query with the identity name, login and ID prefixes
+func (i *IdentityExcerpt) Match(query string) bool {
+	return strings.HasPrefix(i.Id, query) ||
+		strings.Contains(strings.ToLower(i.Name), query) ||
+		strings.Contains(strings.ToLower(i.Login), query)
+}
+
 /*
  * Sorting
  */
diff --git a/doc/queries.md b/doc/queries.md
index f95a1278f5ebf84c2574c3e63bc9597b6754a22d..0c881f35ed3c855010559c7de77210f54c0c8d54 100644
--- a/doc/queries.md
+++ b/doc/queries.md
@@ -11,6 +11,7 @@ A few tips:
 - queries are case insensitive.
 - you can combine as many qualifiers as you want.
 - you can use double quotes for multi-word search terms. For example, `author:"René Descartes"` searches for bugs opened by René Descartes, whereas `author:René Descartes` will throw an error since full-text search is not yet supported.
+- instead of a complete ID, you can use any prefix length. For example `participant=9ed1a`.
 
 
 ## Filtering