diff --git a/Components/9918/Implementation/9918Base.hpp b/Components/9918/Implementation/9918Base.hpp
index 355ca85e4..70a31ea30 100644
--- a/Components/9918/Implementation/9918Base.hpp
+++ b/Components/9918/Implementation/9918Base.hpp
@@ -27,19 +27,6 @@
 namespace TI {
 namespace TMS {
 
-// Additional properties that correlate with personality.
-constexpr size_t memory_size(Personality p) {
-	switch(p) {
-		case TI::TMS::TMS9918A:
-		case TI::TMS::SMSVDP:
-		case TI::TMS::SMS2VDP:
-		case TI::TMS::GGVDP:	return 16 * 1024;
-		case TI::TMS::MDVDP:	return 64 * 1024;
-		case TI::TMS::V9938:	return 128 * 1024;
-		case TI::TMS::V9958:	return 192 * 1024;
-	}
-}
-
 // The screen mode is a necessary predecessor to picking the line mode,
 // which is the thing latched per line.
 enum class ScreenMode {
diff --git a/Components/9918/Implementation/PersonalityTraits.hpp b/Components/9918/Implementation/PersonalityTraits.hpp
index 7ce18f7a7..6a6afdac0 100644
--- a/Components/9918/Implementation/PersonalityTraits.hpp
+++ b/Components/9918/Implementation/PersonalityTraits.hpp
@@ -30,6 +30,18 @@ constexpr bool is_classic_vdp(Personality p) {
 		p == Personality::GGVDP;
 }
 
+constexpr size_t memory_size(Personality p) {
+	switch(p) {
+		case TI::TMS::TMS9918A:
+		case TI::TMS::SMSVDP:
+		case TI::TMS::SMS2VDP:
+		case TI::TMS::GGVDP:	return 16 * 1024;
+		case TI::TMS::MDVDP:	return 64 * 1024;
+		case TI::TMS::V9938:	return 128 * 1024;
+		case TI::TMS::V9958:	return 192 * 1024;
+	}
+}
+
 }
 }