diff --git a/tools/buildman/builder.py b/tools/buildman/builder.py
index 784c64122b..3fd4fac695 100644
--- a/tools/buildman/builder.py
+++ b/tools/buildman/builder.py
@@ -979,7 +979,7 @@ class Builder:
 
         The summary takes the form of one line per architecture. The
         line contains deltas for each of the sections (+ means the section
-        got bigger, - means smaller). The nunmbers are the average number
+        got bigger, - means smaller). The numbers are the average number
         of bytes that a board in this section increased by.
 
         For example: