diff --git a/datajoint/diagram.py b/datajoint/diagram.py
index 1edc62c6..aeced065 100644
--- a/datajoint/diagram.py
+++ b/datajoint/diagram.py
@@ -62,7 +62,7 @@ class Diagram(nx.DiGraph):
 
         diag1 + diag2  - combines the two diagrams.
         diag1 - diag2  - difference between diagrams
-        diag1 * diag2  - intersction of diagrams
+        diag1 * diag2  - intersection of diagrams
         diag + n   - expands n levels of successors
         diag - n   - expands n levels of predecessors
         Thus dj.Diagram(schema.Table)+1-1 defines the diagram of immediate ancestors and descendants of schema.Table