diff --git a/common/scanner.h b/common/scanner.h
index 6cbc5d5..d51d322 100644
--- a/common/scanner.h
+++ b/common/scanner.h
@@ -1,7 +1,6 @@
 #include "tree_sitter/parser.h"
 #include <string.h>
 #include <wctype.h>
-#include <stdio.h>
 
 enum ObjectScript_Core_Scanner_TokenType {
   _IMMEDIATE_SINGLE_WHITESPACE_FOLLOWED_BY_NON_WHITESPACE,
diff --git a/objectscript_routine/src/scanner.c b/objectscript_routine/src/scanner.c
index de20776..b514eee 100644
--- a/objectscript_routine/src/scanner.c
+++ b/objectscript_routine/src/scanner.c
@@ -1,6 +1,5 @@
 #include "../../common/scanner.h"
 #include "tree_sitter/parser.h"
-#include <stdlib.h>
 #include <string.h>
 
 // Keep this in sync with grammar externals.
diff --git a/udl/src/scanner.c b/udl/src/scanner.c
index 276ba40..6d84301 100644
--- a/udl/src/scanner.c
+++ b/udl/src/scanner.c
@@ -1,6 +1,5 @@
 #include "../../common/scanner.h"
 #include "tree_sitter/parser.h"
-#include <stdlib.h>
 #include <string.h>
 
 // There is no way to extend enums, so keep this in sync with base.h