diff --git a/README.md b/README.md
index 0ebec07..3d3cf3e 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ features
 --------
 
 - Very fast, small and efficient.
-- Uses only integer math.
+- Uses only integer math (32bit).
 - No dependencies (uses only stdint standard library), extremely portable.
 - Single header, KISS.
 - Advanced rendering of variable height floor and ceiling.