diff --git a/README.md b/README.md
index 61ece8c..b4781ed 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ Encoded file extensions:
 - `.hp`
 - `.hpp`
 - `.hxx`
+- `.inc`
 
 ## Usage
 
diff --git a/src/main.rs b/src/main.rs
index 3be6143..dcfebdf 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -59,6 +59,7 @@ fn is_text_file(path: &Path) -> bool {
         || ext == OsStr::new("hp")
         || ext == OsStr::new("hpp")
         || ext == OsStr::new("hxx")
+        || ext == OsStr::new("inc")
 }
 
 macro_rules! debug_println {