diff --git a/AsyncDisplayKit/Details/ASRangeController.h b/AsyncDisplayKit/Details/ASRangeController.h
index 22821f430e..0629c14ac2 100644
--- a/AsyncDisplayKit/Details/ASRangeController.h
+++ b/AsyncDisplayKit/Details/ASRangeController.h
@@ -12,8 +12,8 @@
 
 typedef struct {
   // working range buffers, on either side of scroll
-  NSInteger trailingBufferScreenfuls;
-  NSInteger leadingBufferScreenfuls;
+  CGFloat trailingBufferScreenfuls;
+  CGFloat leadingBufferScreenfuls;
 } ASRangeTuningParameters;
 
 @protocol ASRangeControllerDelegate;
diff --git a/AsyncDisplayKit/Details/ASRangeController.mm b/AsyncDisplayKit/Details/ASRangeController.mm
index 30bf08503e..5019ead26e 100644
--- a/AsyncDisplayKit/Details/ASRangeController.mm
+++ b/AsyncDisplayKit/Details/ASRangeController.mm
@@ -58,8 +58,8 @@ typedef NS_ENUM(NSInteger, ASScrollDirection) {
     return nil;
 
   _tuningParameters = {
-    .trailingBufferScreenfuls = 1,
-    .leadingBufferScreenfuls = 2,
+    .trailingBufferScreenfuls = 1.0f,
+    .leadingBufferScreenfuls = 2.0f,
   };
 
   return self;
diff --git a/docs/guide/3-asynchronous-display.md b/docs/guide/3-asynchronous-display.md
index e02c4d90eb..acc9f37911 100644
--- a/docs/guide/3-asynchronous-display.md
+++ b/docs/guide/3-asynchronous-display.md
@@ -60,8 +60,8 @@ need to be pruned quickly.
 ```objective-c
 ASRangeController *rangeController = [[ASRangeController alloc] init];
 rangeController.tuningParameters = (ASRangeTuningParameters){
-  .leadingBufferScreenfuls = 2; // two screenfuls in the direction of scroll
-  .trailingBufferScreenfuls = 1; // one screenful in the other direction
+  .leadingBufferScreenfuls = 2.0f; // two screenfuls in the direction of scroll
+  .trailingBufferScreenfuls = 0.5f; // one-half screenful in the other direction
 };
 ```