diff --git a/include/nanocbor/nanocbor.h b/include/nanocbor/nanocbor.h
index 218f920..d773084 100644
--- a/include/nanocbor/nanocbor.h
+++ b/include/nanocbor/nanocbor.h
@@ -30,8 +30,8 @@
 #ifndef NANOCBOR_NANOCBOR_H
 #define NANOCBOR_NANOCBOR_H
 
-#include <inttypes.h>
 #include <stdbool.h>
+#include <stdint.h>
 #include <stdlib.h>
 
 #ifdef __cplusplus
@@ -448,7 +448,7 @@ int nanocbor_get_tstr(nanocbor_value_t *cvalue, const uint8_t **buf,
  * @return              NANOCBOR_OK if @p key was found
  * @return              negative on error / not found
  */
-int nanocbor_get_key_tstr(nanocbor_value_t *start, const char *key,
+int nanocbor_get_key_tstr(const nanocbor_value_t *start, const char *key,
                           nanocbor_value_t *value);
 
 /**
diff --git a/tests/automated/test_decoder.c b/tests/automated/test_decoder.c
index 3f156c1..a441319 100644
--- a/tests/automated/test_decoder.c
+++ b/tests/automated/test_decoder.c
@@ -5,6 +5,8 @@
 #include "nanocbor/nanocbor.h"
 #include "test.h"
 #include <CUnit/CUnit.h>
+#include <stdbool.h>
+#include <stdlib.h>
 
 /* NOLINTBEGIN(cppcoreguidelines-avoid-magic-numbers) */