diff --git a/include/stdint.h b/include/stdint.h
index 5f8f077..8430c46 100644
--- a/include/stdint.h
+++ b/include/stdint.h
@@ -25,6 +25,7 @@ typedef __UINT64_TYPE__		uint64_t;
 
 /** Unsigned size specifier. */
 typedef __SIZE_TYPE__		size_t;
+typedef __SIZE_TYPE__		uintptr_t;
 /** Signed size specifier (negative sizes mean error codes). */
 typedef __PTRDIFF_TYPE__	ssize_t;
 typedef __PTRDIFF_TYPE__	ptrdiff_t;
diff --git a/include/toolchain.h b/include/toolchain.h
index 76b7730..b4f2dac 100644
--- a/include/toolchain.h
+++ b/include/toolchain.h
@@ -46,6 +46,9 @@
 #define __section(name) __attribute__((section(#name)))
 #endif /* __section */
 
+/** Place a variable in program memory rather than into RAM. */
+#define __rodata __section(.rodata#)
+
 /*
  * Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
  *