diff --git a/src/what-unsafe-does.md b/src/what-unsafe-does.md
index 64694ee4..cd3d1c18 100644
--- a/src/what-unsafe-does.md
+++ b/src/what-unsafe-does.md
@@ -72,7 +72,7 @@ Rust considers it "safe" to:
 * Have a [race condition][race]
 * Leak memory
 * Fail to call destructors
-* Overflow integers
+* Overflow integers (with the built-in operators such as `+` etc.)
 * Abort the program
 * Delete the production database