diff --git a/src/PIL/ImageFont.py b/src/PIL/ImageFont.py
index 901903d827d..0331a5c458c 100644
--- a/src/PIL/ImageFont.py
+++ b/src/PIL/ImageFont.py
@@ -788,11 +788,11 @@ def truetype(font=None, size=10, index=0, encoding="", layout_engine=None):
                      .. versionadded:: 4.2.0
     :return: A font object.
     :exception OSError: If the file could not be read.
-    :exception ValueError: If the size given is invalid.
+    :exception ValueError: If the font size is not greater than zero.
     """
 
     if size <= 0:
-        msg = "font size must be positive"
+        msg = "font size must be greater than 0"
         raise ValueError(msg)
 
     def freetype(font):