It's 12 on i586.

---
 include/libcamera/controls.h |    2 --
 1 file changed, 2 deletions(-)

Index: libcamera/include/libcamera/controls.h
===================================================================
--- libcamera.orig/include/libcamera/controls.h
+++ libcamera/include/libcamera/controls.h
@@ -170,8 +170,6 @@ private:
 		 std::size_t numElements, std::size_t elementSize);
 };
 
-static_assert(sizeof(ControlValue) == 16, "Invalid size of ControlValue class");
-
 class ControlId
 {
 public: