diff --git a/src/core/hw/gpu.h b/src/core/hw/gpu.h
index 9e0701605..a00adbf53 100644
--- a/src/core/hw/gpu.h
+++ b/src/core/hw/gpu.h
@@ -263,7 +263,7 @@ struct Regs {
 
     INSERT_PADDING_WORDS(0x9c3);
 
-    static inline size_t NumIds() {
+    static constexpr size_t NumIds() {
         return sizeof(Regs) / sizeof(u32);
     }
 
diff --git a/src/core/hw/lcd.h b/src/core/hw/lcd.h
index d8ece4980..3dd877fbf 100644
--- a/src/core/hw/lcd.h
+++ b/src/core/hw/lcd.h
@@ -38,7 +38,7 @@ struct Regs {
     u32 backlight_bottom;
     INSERT_PADDING_WORDS(0x16F);
 
-    static inline size_t NumIds() {
+    static constexpr size_t NumIds() {
         return sizeof(Regs) / sizeof(u32);
     }
 
diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index d66124410..337cff8ce 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -1221,7 +1221,7 @@ struct Regs {
     // Used for debugging purposes, so performance is not an issue here
     static std::string GetCommandName(int index);
 
-    static inline size_t NumIds() {
+    static constexpr size_t NumIds() {
         return sizeof(Regs) / sizeof(u32);
     }