diff --git a/Makefile b/Makefile
index 878964a..32478bc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,4 @@
+HASH := $(shell git rev-parse --short HEAD)
 SRCS := $(wildcard src/*.c)
 OBJS := $(SRCS:src/%.c=build/%.o)
 DEPS := $(OBJS:%.o=%.d)
@@ -6,7 +7,7 @@ WARNING_FLAGS := -Wall -Wextra
 INCLUDE_FLAGS := -I include
 
 CC := clang
-CFLAGS := $(WARNING_FLAGS) $(INCLUDE_FLAGS) -MMD -MP -std=c99 -ggdb
+CFLAGS := $(WARNING_FLAGS) $(INCLUDE_FLAGS) -DKILO_COMMIT_HASH=$(HASH) -MMD -MP -std=c99 -ggdb
 
 kilo: $(OBJS)
 	$(CC) $(CFLAGS) $^ -o $@
diff --git a/include/kilo.h b/include/kilo.h
index 0127fd6..3fc14f3 100644
--- a/include/kilo.h
+++ b/include/kilo.h
@@ -1,7 +1,6 @@
 #ifndef KILO_H
 #define KILO_H
 
-#define KILO_VERSION "0.0.1"
 #define KILO_TAB_STOP 4
 
 #include <termios.h>
diff --git a/include/utils.h b/include/utils.h
index efa9ef9..063bfac 100644
--- a/include/utils.h
+++ b/include/utils.h
@@ -6,6 +6,9 @@
 #define MAX(a,b) (((a)>(b))?(a):(b))
 #define MIN(a,b) (((a)<(b))?(a):(b))
 
+#define _STRINGIZE(x) #x
+#define STRINGIZE(x) _STRINGIZE(x)
+
 typedef int ERRCODE;
 #define RETURN(code) do {errcode = code; goto END;} while(0)
 
diff --git a/src/ui.c b/src/ui.c
index 6be551c..571ab38 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -50,7 +50,7 @@ static void ui_draw_rows(struct append_buf *draw_buf) {
         } else if (no_file && y == E.screenrows / 2) {
             char welcome[64];
             int len = snprintf(welcome, sizeof(welcome),
-                               "Welcome to kilo! -- v%s", KILO_VERSION);
+                               "Welcome to kilo! -- %s", STRINGIZE(KILO_COMMIT_HASH));
 
             int padding = (E.screencols - len) / 2;
             for (int i = 0; i < padding; i++)