diff --git a/ldap.h b/ldap.h
index 17c3852..96fc5c0 100644
--- a/ldap.h
+++ b/ldap.h
@@ -5,6 +5,7 @@
 #include <inttypes.h>
 #include "asn1.h"
 
+/* return zero if same, otherwise nonzero */
 int matchstring(struct string* s,const char* c);
 int matchcasestring(struct string* s,const char* c);
 int matchprefix(struct string* s,const char* c);
diff --git a/tinyldap.c b/tinyldap.c
index e77174c..c0b91cf 100644
--- a/tinyldap.c
+++ b/tinyldap.c
@@ -1431,8 +1431,14 @@ static int lookupdn(struct string* dn,size_t* index, struct hashnode** hn) {
       }
       for (; i<=result.last; ++i) {
 	if (isset(&result,i)) {
-	  *index=i;
-	  return 1;
+	  uint32 j;
+	  uint32_unpack(map+indices_offset+4*i,&j);
+	  uint32 k;
+	  uint32_unpack(map+j+8,&k);
+	  if (!matchstring(dn,map+k)) {
+	    *index=i;
+	    return 1;
+	  }
 	}
       }
     }