diff --git a/Source/GSTheme.m b/Source/GSTheme.m
index 066784d69..b3a3fbe31 100644
--- a/Source/GSTheme.m
+++ b/Source/GSTheme.m
@@ -1341,7 +1341,8 @@ typedef	struct {
 
 - (BOOL) isDarkMode
 {
-  return NO;
+  return [[[self infoDictionary] objectForKey: @"GSThemeDarkMode"]
+	   isEqualToString: @"YES"];
 }
 
 @end