diff --git a/runtime/queries/c/injections.scm b/runtime/queries/c/injections.scm
index 321c90ad..3832c75e 100644
--- a/runtime/queries/c/injections.scm
+++ b/runtime/queries/c/injections.scm
@@ -1,2 +1,6 @@
 ((comment) @injection.content
  (#set! injection.language "comment"))
+
+((preproc_arg) @injection.content
+ (#set! injection.language "c")
+ (#set! injection.include-children))
diff --git a/runtime/queries/cpp/injections.scm b/runtime/queries/cpp/injections.scm
index fb783bb6..ec361f49 100644
--- a/runtime/queries/cpp/injections.scm
+++ b/runtime/queries/cpp/injections.scm
@@ -1,4 +1,9 @@
 ; inherits: c
+
+((preproc_arg) @injection.content
+ (#set! injection.language "cpp")
+ (#set! injection.include-children))
+
 (raw_string_literal
   delimiter: (raw_string_delimiter) @injection.language
   (raw_string_content) @injection.content)