1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index a765ff0..b23c425 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 PREFIX ?= /usr/local
 BINDIR ?= /bin
 
-CFLAGS = -Wunused-variable -Wunused-function
+CFLAGS ?= -std=c99 -Wunused-variable -Wunused-function
 
 all: vkill