diff --git a/src/Makefile b/src/Makefile
index 6fc357d..1f2182f 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -4,7 +4,7 @@ PKG_CONFIG ?= pkg-config
 
 # flags
 CFLAGS ?= -march=native -O2 -pipe
-CFLAGS += -std=c99 -pedantic -Wall -Wextra -Werror -Wno-unused-variable -Wno-unused-parameter
+CFLAGS += -std=c99 -pedantic -Wall -Wextra -Werror -Wno-unused-variable -Wno-unused-parameter -Wno-unused-function
 ifeq ($(shell $(CC) -v 2>&1 | grep 'gcc version' &>/dev/null && echo 1),1)
 CFLAGS += -Wno-unused-but-set-variable
 endif