--- glib/tests/Makefile.am.ori	2009-05-04 16:33:35.000000000 +0200
+++ glib/tests/Makefile.am	2009-05-04 17:23:20.000000000 +0200
@@ -32,6 +32,7 @@
 
 TEST_PROGS        += strfuncs
 strfuncs_SOURCES   = strfuncs.c
+strfuncs_CPPFLAGS  = -D_ISOC99_SOURCE
 strfuncs_LDADD	   = $(progs_ldadd) -lm
 
 TEST_PROGS        += string