diff --git a/linear.c b/core/linear.c
similarity index 100%
rename from linear.c
rename to core/linear.c
diff --git a/linear.h b/core/linear.h
similarity index 98%
rename from linear.h
rename to core/linear.h
index fa7bf72..9cf32e9 100644
--- a/linear.h
+++ b/core/linear.h
@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
-#include "types.h"
+#include "../types.h"
 
 #define PI 3.14159265358979323846
 #define RAD(deg) deg * (PI / 180.0f)
diff --git a/makefile b/makefile
index 84b788c..e5bcd7a 100644
--- a/makefile
+++ b/makefile
@@ -7,7 +7,7 @@ endif
 
 SRC:=\
      topaz.c\
-     linear.c\
+     core/linear.c\
      core/arena.c\
      core/vector.c\