diff --git a/Makefile b/Makefile
index 8c4b6a7..fc878b1 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@ INCLUDES = $(wildcard *.h) version.h
 OBJECTS = $(SOURCES:.c=.o)
 DEPS = libxml-2.0
 
-CFLAGS = -D_FILE_OFFSET_BITS=64 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE
+CFLAGS = -O3 -D_FILE_OFFSET_BITS=64 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE
 CFLAGS += $(shell pkg-config --cflags $(DEPS))
 LDFLAGS = -lm $(shell pkg-config --libs $(DEPS))