diff --git a/src/event_object_movement.c b/src/event_object_movement.c
index 3025e0849..d4b89fbae 100644
--- a/src/event_object_movement.c
+++ b/src/event_object_movement.c
@@ -2575,7 +2575,7 @@ bool8 MovementType_WanderAround_Step2(struct ObjectEvent *objectEvent, struct Sp
 {
     if (!ObjectEventExecSingleMovementAction(objectEvent, sprite))
         return FALSE;
-    SetMovementDelay(sprite, sMovementDelaysMedium[Random() & 3]);
+    SetMovementDelay(sprite, sMovementDelaysMedium[Random() % ARRAY_COUNT(sMovementDelaysMedium)]);
     sprite->sTypeFuncId = 3;
     return TRUE;
 }
@@ -2855,7 +2855,7 @@ bool8 MovementType_LookAround_Step2(struct ObjectEvent *objectEvent, struct Spri
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysMedium[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysMedium[Random() % ARRAY_COUNT(sMovementDelaysMedium)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -2907,7 +2907,7 @@ bool8 MovementType_WanderUpAndDown_Step2(struct ObjectEvent *objectEvent, struct
     if (!ObjectEventExecSingleMovementAction(objectEvent, sprite))
         return FALSE;
 
-    SetMovementDelay(sprite, sMovementDelaysMedium[Random() & 3]);
+    SetMovementDelay(sprite, sMovementDelaysMedium[Random() % ARRAY_COUNT(sMovementDelaysMedium)]);
     sprite->sTypeFuncId = 3;
     return TRUE;
 }
@@ -2975,7 +2975,7 @@ bool8 MovementType_WanderLeftAndRight_Step2(struct ObjectEvent *objectEvent, str
     if (!ObjectEventExecSingleMovementAction(objectEvent, sprite))
         return FALSE;
 
-    SetMovementDelay(sprite, sMovementDelaysMedium[Random() & 3]);
+    SetMovementDelay(sprite, sMovementDelaysMedium[Random() % ARRAY_COUNT(sMovementDelaysMedium)]);
     sprite->sTypeFuncId = 3;
     return TRUE;
 }
@@ -3195,7 +3195,7 @@ bool8 MovementType_FaceDownAndUp_Step2(struct ObjectEvent *objectEvent, struct S
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysMedium[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysMedium[Random() % ARRAY_COUNT(sMovementDelaysMedium)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3245,7 +3245,7 @@ bool8 MovementType_FaceLeftAndRight_Step2(struct ObjectEvent *objectEvent, struc
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysMedium[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysMedium[Random() % ARRAY_COUNT(sMovementDelaysMedium)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3295,7 +3295,7 @@ bool8 MovementType_FaceUpAndLeft_Step2(struct ObjectEvent *objectEvent, struct S
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3345,7 +3345,7 @@ bool8 MovementType_FaceUpAndRight_Step2(struct ObjectEvent *objectEvent, struct
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3395,7 +3395,7 @@ bool8 MovementType_FaceDownAndLeft_Step2(struct ObjectEvent *objectEvent, struct
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3445,7 +3445,7 @@ bool8 MovementType_FaceDownAndRight_Step2(struct ObjectEvent *objectEvent, struc
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3495,7 +3495,7 @@ bool8 MovementType_FaceDownUpAndLeft_Step2(struct ObjectEvent *objectEvent, stru
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3545,7 +3545,7 @@ bool8 MovementType_FaceDownUpAndRight_Step2(struct ObjectEvent *objectEvent, str
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3595,7 +3595,7 @@ bool8 MovementType_FaceUpLeftAndRight_Step2(struct ObjectEvent *objectEvent, str
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }
@@ -3645,7 +3645,7 @@ bool8 MovementType_FaceDownLeftAndRight_Step2(struct ObjectEvent *objectEvent, s
 {
     if (ObjectEventExecSingleMovementAction(objectEvent, sprite))
     {
-        SetMovementDelay(sprite, sMovementDelaysShort[Random() & 3]);
+        SetMovementDelay(sprite, sMovementDelaysShort[Random() % ARRAY_COUNT(sMovementDelaysShort)]);
         objectEvent->singleMovementActive = FALSE;
         sprite->sTypeFuncId = 3;
     }