diff --git a/chapter_preliminaries/pandas.md b/chapter_preliminaries/pandas.md
index 49e006295..9884437f4 100644
--- a/chapter_preliminaries/pandas.md
+++ b/chapter_preliminaries/pandas.md
@@ -55,7 +55,7 @@ print(data)
 ```{.python .input}
 #@tab all
 inputs, outputs = data.iloc[:, 0:2], data.iloc[:, 2]
-inputs = inputs.fillna(inputs.mean())
+inputs = inputs.fillna(inputs.mean(numeric_only=True))
 print(inputs)
 ```