diff --git a/src/librustc_typeck/diagnostics.rs b/src/librustc_typeck/diagnostics.rs
index 100415c29c67..2bf1c0bb4d35 100644
--- a/src/librustc_typeck/diagnostics.rs
+++ b/src/librustc_typeck/diagnostics.rs
@@ -1126,7 +1126,7 @@ fn main() {
 }
 ```
 
-The number of supplied parameters much exactly match the number of defined type
+The number of supplied parameters must exactly match the number of defined type
 parameters.
 "##,