diff --git a/debian/control b/debian/control
index 3b392be..8b71f81 100644
--- a/debian/control
+++ b/debian/control
@@ -1,4 +1,6 @@
 Source: libasn1c
+Conflicts: osmo-libasn1c
+Replaces: osmo-libasn1c
 Section: libs
 Priority: extra
 Maintainer: Osmocom team <openbsc@lists.osmocom.org>
@@ -11,6 +13,8 @@ Vcs-Browser: http://git.osmocom.org/gitweb?p=libasn1c.git;a=summary
 Homepage: https://projects.osmocom.org/projects/libasn1c
 
 Package: libasn1c1
+Conflicts: osmo-libasn1c1
+Replaces: osmo-libasn1c1
 Section: libs
 Architecture: any
 Multi-Arch: same
@@ -19,6 +23,8 @@ Depends: ${misc:Depends}, ${shlibs:Depends}
 Description: asn1c runtime code as shared library
 
 Package: libasn1c-dbg
+Conflicts: osmo-libasn1c-dbg
+Replaces: osmo-libasn1c-dbg
 Section: debug
 Architecture: any
 Multi-Arch: same
@@ -26,6 +32,8 @@ Depends: libasn1c1 (= ${binary:Version}), ${misc:Depends}
 Description: asn1c runtime code as shared library
 
 Package: libasn1c-dev
+Conflicts: osmo-libasn1c-dev
+Replaces: osmo-libasn1c-dev
 Section: libdevel
 Architecture: any
 Multi-Arch: same