diff --git a/src/base.h b/src/base.h
index ff21b9e..8466e36 100644
--- a/src/base.h
+++ b/src/base.h
@@ -32,6 +32,9 @@ typedef double f64;
 #define WIDTH  800
 #define HEIGHT 600
 
+// All "programs" are 64 bytes.
+#define SIZEOF_PROGRAM 64
+
 #endif
 
 /* Copyright (C) 2026 Aryadev Chavali
diff --git a/src/bf.h b/src/bf.h
index c4be5aa..b8fdbb3 100644
--- a/src/bf.h
+++ b/src/bf.h
@@ -12,9 +12,6 @@
 
 typedef i8 bf_token;
 
-// All "programs" are 64 bytes.
-#define SIZEOF_PROGRAM 64
-
 struct ProgramConcat
 {
   bf_token *a, *b;