diff --git a/LEGO1/lego/legoomni/src/race/legoracers.cpp b/LEGO1/lego/legoomni/src/race/legoracers.cpp
index 705b3eb2..a313c610 100644
--- a/LEGO1/lego/legoomni/src/race/legoracers.cpp
+++ b/LEGO1/lego/legoomni/src/race/legoracers.cpp
@@ -180,11 +180,16 @@ void LegoRaceCar::FUN_10012de0()
 	g_unk0x100f0b88 = 0;
 }
 
-// STUB: LEGO1 0x10012e00
-// STUB: BETA10 0x100cb129
+// FUNCTION: LEGO1 0x10012e00
+// FUNCTION: BETA10 0x100cb129
 void LegoRaceCar::FUN_10012e00()
 {
-	// TODO
+	// Note the (likely unintentional) order of operations: `%` is executed before `/`,
+	// so the division is performed at runtime.
+	g_srtsl18to29Index = rand() % sizeof(g_srtsl18to29) / sizeof(g_srtsl18to29[0]);
+	g_srtsl6to10Index = rand() % sizeof(g_srtsl6to10) / sizeof(g_srtsl6to10[0]);
+	g_emptySoundKeyListIndex = rand() % sizeof(g_emptySoundKeyList) / sizeof(g_emptySoundKeyList[0]);
+	g_srtrhIndex = rand() % sizeof(g_srtrh) / sizeof(g_srtrh[0]);
 }
 
 // FUNCTION: LEGO1 0x10012e60