diff --git a/.travis.yml b/.travis.yml
index 57f86c8..9add095 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,6 @@ compiler:
 
 script:
   - ./autogen.sh
-  - ./configure CFLAGS='-Werror -Wno-gnu-variable-sized-type-not-at-end'
+  - ./configure CFLAGS='-Werror'
   - make
   - make check
diff --git a/Makefile.am b/Makefile.am
index 652cdc0..7fc8ebc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,11 @@
 SUBDIRS = include
 
-AM_CFLAGS = -std=c99 -Wall -Wextra -I$(top_srcdir)/include
+AM_CFLAGS = \
+	-std=c99 \
+	-Wall \
+	-Wextra \
+	-Wno-gnu-variable-sized-type-not-at-end \
+	-I$(top_srcdir)/include
 
 lib_LIBRARIES = libkernaux.a