diff --git a/Components/9918/Implementation/9918Base.hpp b/Components/9918/Implementation/9918Base.hpp
index fb09f3215..07726a035 100644
--- a/Components/9918/Implementation/9918Base.hpp
+++ b/Components/9918/Implementation/9918Base.hpp
@@ -32,6 +32,10 @@ enum Personality {
 	MDVDP,
 };
 
+constexpr bool is_sega_vdp(Personality p) {
+	return p >= Personality::SMSVDP;
+}
+
 enum class TVStandard {
 	/*! i.e. 50Hz output at around 312.5 lines/field */
 	PAL,
@@ -39,8 +43,6 @@ enum class TVStandard {
 	NTSC
 };
 
-#define is_sega_vdp(x) ((x) >= SMSVDP)
-
 class Base {
 	public:
 		static uint32_t palette_pack(uint8_t r, uint8_t g, uint8_t b) {