diff --git a/examples/sample.source.LDAP3/Makefile b/examples/sample.source.LDAP3/Makefile
index 2e1ab89..27810c0 100644
--- a/examples/sample.source.LDAP3/Makefile
+++ b/examples/sample.source.LDAP3/Makefile
@@ -184,7 +184,7 @@
 regen: regenerate-from-asn1-source
 
 regenerate-from-asn1-source:
-	../../asn1c/asn1c -S ../../skeletons -fcompound-names ../rfc4511-Lightweight-Directory-Access-Protocol-V3.asn1
+	../../asn1c/asn1c -S ../../skeletons -pdu=LDAPMessage -fcompound-names ../rfc4511-Lightweight-Directory-Access-Protocol-V3.asn1
 
 
 LDAPMessage.c: ../sample.makefile.regen ../rfc4511-Lightweight-Directory-Access-Protocol-V3.asn1