diff --git a/configure.ac b/configure.ac
index 5d7b42d8b..872275791 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,7 +38,7 @@ AC_STDC_HEADERS
 AC_CHECK_HEADER([pthread.h], AC_DEFINE(HAVE_PTHREAD_H))
 AC_CHECK_HEADER([nobug.h], AC_DEFINE(HAVE_NOBUG_H))
 AC_CHECK_HEADER([execinfo.h], AC_DEFINE(HAVE_EXECINFO_H))
-AC_CHECK_HEADER([valgrind/valgrind.h], AC_DEFINE(HAVE_VALGRIND_VALGRIND_H))
+# there is a warning in nobug, disabled til fixed AC_CHECK_HEADER([valgrind/valgrind.h], AC_DEFINE(HAVE_VALGRIND_VALGRIND_H))
 
 #
 # user options
diff --git a/src/lib/Makefile.am b/src/lib/Makefile.am
index 236b916a7..b6c493a18 100644
--- a/src/lib/Makefile.am
+++ b/src/lib/Makefile.am
@@ -18,7 +18,7 @@
 libcin3_a_srcdir = $(top_srcdir)/src/lib
 noinst_LIBRARIES += libcin3.a
 
-#libcin3_a_CFLAGS = $(CFLAGS)
+libcin3_a_CFLAGS = $(CFLAGS) -std=gnu99 -Wall -Werror
 
 libcin3_a_SOURCES = $(libcin3_a_srcdir)/plugin.c
 noinst_HEADERS += $(libcin3_a_srcdir)/plugin.h