diff --git a/lib/constants.h b/lib/constants.h
new file mode 100644
index 0000000..6e87231
--- /dev/null
+++ b/lib/constants.h
@@ -0,0 +1 @@
+char* HELLO = "Hello, world!";
diff --git a/src/main.c b/src/main.c
index 329858e..a507bd9 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
+#include "constants.h"
 
 int main(int argc, char* argv[]) {
-	printf("Hello, world!\n");
+	printf("%s\n", HELLO);
 	return 0;
 }