diff --git a/src/PIL/ExifTags.py b/src/PIL/ExifTags.py
index c00730ba9..3df1dbf72 100644
--- a/src/PIL/ExifTags.py
+++ b/src/PIL/ExifTags.py
@@ -346,3 +346,27 @@ class Interop(IntEnum):
     RelatedImageFileFormat = 4096
     RelatedImageWidth = 4097
     RleatedImageHeight = 4098
+
+
+class LightSource(IntEnum):
+    Unknown = 0
+    Daylight = 1
+    Fluorescent = 2
+    Tungsten = 3
+    Flash = 4
+    Fine = 9
+    Cloudy = 10
+    Shade = 11
+    DaylightFluorescent = 12
+    DayWhiteFluorescent = 13
+    CoolWhiteFluorescent = 14
+    WhiteFluorescent = 15
+    StandardLightA = 17
+    StandardLightB = 18
+    StandardLightC = 19
+    D55 = 20
+    D65 = 21
+    D75 = 22
+    D50 = 23
+    ISO = 24
+    Other = 255