--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -3,6 +3,6 @@
 bin_PROGRAMS = wayv
 data_DATA = wayv.conf DEFAULT.wkey
 wayv_SOURCES = ai.c aimath.c backend.c display.c gesture.c process.c setup.c misc.c
-CFLAGS = -Wall -O2 -DSETUPPATH=\"@datadir@\"
+AM_CFLAGS = -DSETUPPATH=\"@datadir@\"
 wayv_LDADD = @X_LIBS@
 wayv_LDFLAGS = -I@x_includes@ -L@x_libraries@