diff --git a/src/plugins/proctrack/Makefile.am b/src/plugins/proctrack/Makefile.am
index cc680d33937a1e2c9be7d74092dcab77eba4811d..f83345000927a1fef4df777204b7ba3ba5022a4c 100644
--- a/src/plugins/proctrack/Makefile.am
+++ b/src/plugins/proctrack/Makefile.am
@@ -1,4 +1,8 @@
 # $Id$
 # Makefile for proctrack plugins
 
+if HAVE_AIX
 SUBDIRS = aix sid
+else
+SUBDIRS = sid
+endif