diff --git a/Makefile.am b/Makefile.am
index 49e8476..9d349c2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3,7 +3,7 @@
 #
 WARN_CLANG=-Wformat-nonliteral -Wstrncat-size -Wformat-security -Wsign-conversion -Wconversion -Wfloat-conversion -Wshorten-64-to-32 -Wuninitialized -Wmissing-variable-declarations  -Wmissing-declarations
 WARN_GCC=-Wformat=2 -Wformat-overflow=2 -Wformat-nonliteral -Wformat-truncation=2 -Wnull-dereference -Wstrict-overflow=2 -Wstringop-overflow=4 -Walloca-larger-than=4096 -Wtype-limits -Wconversion -Wtrampolines -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -fno-common -Wcast-align
-CFLAGS ?= -march=native -flto
+CFLAGS ?= -g
 OPTS=-I. -O3 $(CFLAGS) -fcommon
 # -Wall -g -pedantic
 LIBS=-lm