diff --git a/examples/dc_user/Makefile.am b/examples/dc_user/Makefile.am
index dd5d94c7..db4e4261 100644
--- a/examples/dc_user/Makefile.am
+++ b/examples/dc_user/Makefile.am
@@ -27,12 +27,10 @@
 #
 #------------------------------------------------------------------------------
 
-AM_CFLAGS = -Wall
-
 noinst_PROGRAMS = ec_dc_user_example
 
 ec_dc_user_example_SOURCES = main.c
-ec_dc_user_example_CFLAGS = -I$(top_srcdir)/include
+ec_dc_user_example_CFLAGS = -I$(top_srcdir)/include -Wall
 ec_dc_user_example_LDFLAGS = -L$(top_builddir)/lib/.libs -lethercat -lrt
 
 #------------------------------------------------------------------------------
diff --git a/examples/user/Makefile.am b/examples/user/Makefile.am
index 6eed3caa..7edd532d 100644
--- a/examples/user/Makefile.am
+++ b/examples/user/Makefile.am
@@ -27,12 +27,10 @@
 #
 #------------------------------------------------------------------------------
 
-AM_CFLAGS = -Wall
-
 noinst_PROGRAMS = ec_user_example
 
 ec_user_example_SOURCES = main.c
-ec_user_example_CFLAGS = -I$(top_srcdir)/include
+ec_user_example_CFLAGS = -I$(top_srcdir)/include -Wall
 ec_user_example_LDFLAGS = -L$(top_builddir)/lib/.libs -lethercat
 
 #------------------------------------------------------------------------------
diff --git a/examples/user/main.c b/examples/user/main.c
index a1bcc149..790c38df 100644
--- a/examples/user/main.c
+++ b/examples/user/main.c
@@ -255,8 +255,6 @@ void read_sdo(void)
 
 void cyclic_task()
 {
-    int i;
-
     // receive process data
     ecrt_master_receive(master);
     ecrt_domain_process(domain1);
diff --git a/lib/Makefile.am b/lib/Makefile.am
index dd3ae296..91977ca2 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -28,14 +28,12 @@
 #
 #------------------------------------------------------------------------------
 
-AM_CFLAGS = -Wall
-
 lib_LTLIBRARIES = libethercat.la
 
 #------------------------------------------------------------------------------
 
+libethercat_la_CFLAGS = -I$(srcdir)/.. -fno-strict-aliasing -Wall
 libethercat_la_LDFLAGS = -version-info 1:0:0
-libethercat_la_CFLAGS = -I$(srcdir)/.. -fno-strict-aliasing
 libethercat_la_SOURCES = \
 	common.c \
 	domain.c \