diff --git a/.editorconfig b/.editorconfig
index 553e99d0..e633e8a6 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -15,6 +15,10 @@ indent_size = 4
 indent_style = unset
 indent_size = unset
 
+[*.dia]
+indent_style = space
+indent_size = 2
+
 [*{.json,.ecrc}]
 indent_style = space
 indent_size = 2