Index: src/libcfa/Makefile.am
===================================================================
--- src/libcfa/Makefile.am	(revision dd5190664a69fab66e1b83a45dbd80f155c0ce79)
+++ src/libcfa/Makefile.am	(revision 8c8c2d9cc4d96ee78b702068153462df3bd69911)
@@ -11,6 +11,6 @@
 ## Created On       : Sun May 31 08:54:01 2015
 ## Last Modified By : Peter A. Buhr
-## Last Modified On : Tue May 31 13:24:15 2016
-## Update Count     : 141
+## Last Modified On : Tue Jun  7 14:38:18 2016
+## Update Count     : 142
 ###############################################################################
 
@@ -54,5 +54,8 @@
 
 headers = limits stdlib math iostream fstream iterator rational
-.SECONDARY : ${headers}					# stop implicit '.o' rules from removing extensionless headers
+.PRECIOUS : ${headers}						# stop implicit '.o' rules from removing extensionless headers
+
+#.SECONDARY : ${headers}					# stop implicit '.o' rules from removing extensionless headers
+
 
 libcfa_a_SOURCES = libcfa-prelude.c ${headers:=.c}