diff --git a/.editorconfig b/.editorconfig
index e9070240..f5fa2563 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,13 +1,16 @@
-root = true
-
-[*]
-indent_style    = tab
-indent_size     = 4
-end_of_line     = lf
-max_line_length = 100
-insert_final_newline     = true
-trim_trailing_whitespace = true
-
-[*.md]
-trim_trailing_whitespace = false
-max_line_length = 80
+root = true
+
+[*]
+indent_style    = tab
+indent_size     = 4
+end_of_line     = lf
+max_line_length = 100
+insert_final_newline     = true
+trim_trailing_whitespace = true
+
+[*.c99.h]
+indent_style = space
+
+[*.md]
+trim_trailing_whitespace = false
+max_line_length = 80