diff --git a/common/rdr/Makefile.am b/common/rdr/Makefile.am
index 589ad80..d25f77c 100644
--- a/common/rdr/Makefile.am
+++ b/common/rdr/Makefile.am
@@ -14,5 +14,5 @@
 
 if INCLUDED_ZLIB
 librdr_la_CPPFLAGS += -I$(top_srcdir)/common/zlib
-librdr_la_LIBADD += $(top_srcdir)/common/zlib/libz.la
+librdr_la_LIBADD += $(top_builddir)/common/zlib/libz.la
 endif