diff --git a/programs/bpf/c/sdk/inc/solana_sdk.h b/programs/bpf/c/sdk/inc/solana_sdk.h
index e3b602a4ae..cc515b7a3e 100644
--- a/programs/bpf/c/sdk/inc/solana_sdk.h
+++ b/programs/bpf/c/sdk/inc/solana_sdk.h
@@ -51,11 +51,11 @@ static_assert(sizeof(uint64_t) == 8);
  */
 #define NULL 0
 
-#ifndef __cplusplus
 /**
  * Boolean type
  */
-typedef enum { false = 0, true } bool;
+#ifndef __cplusplus
+#include <stdbool.h>
 #endif
 
 /**
diff --git a/programs/bpf/c/sdk/inc/wchar.h b/programs/bpf/c/sdk/inc/wchar.h
new file mode 100644
index 0000000000..6f70f09bee
--- /dev/null
+++ b/programs/bpf/c/sdk/inc/wchar.h
@@ -0,0 +1 @@
+#pragma once