diff --git a/TODO.md b/TODO.md
index 53f2b8e..70f75d7 100644
--- a/TODO.md
+++ b/TODO.md
@@ -35,6 +35,10 @@
 - `tape_drive` component, compatible with Computronics, except maybe with proper seek times and support for multiple tapes
 - `cd_reader` and `cd_writer` components, to work with CDs
 
+# API changes
+
+- move controls into the component instances instead of using getters, to boost performance
+
 # Internal changes
 
 - use dynamic arrays for signals (and maybe components), but still keep the maximums to prevent memory hogging
diff --git a/src/components/drive.c b/src/components/drive.c
index ab648fd..099f6e8 100644
--- a/src/components/drive.c
+++ b/src/components/drive.c
@@ -43,7 +43,7 @@ void nni_drive_seekTo(nn_component *component, nni_drive *drive, nn_size_t secto
     sector = sector - 1; // switch to 0 to N-1 sector addressing,
                          // which is much nicer to do math with
                          // and Lua made a big oopsie.
-    size_t old = drive->currentSector;
+    nn_size_t old = drive->currentSector;
     nn_driveControl ctrl = nn_drive_getControl(component, drive);
     if(ctrl.seekSectorsPerTick == 0) return; // seek latency disabled
     nn_computer *computer = nn_getComputerOfComponent(component);