diff --git a/include/ck_cc.h b/include/ck_cc.h
index 98090d9..5fea780 100644
--- a/include/ck_cc.h
+++ b/include/ck_cc.h
@@ -32,6 +32,12 @@
 #include "gcc/ck_cc.h"
 #endif
 
+#ifndef CK_CC_RESTRICT
+#define CK_CC_RESTRICT
+#endif
+
+#define CK_CC_DECONST_PTR(X) ((void *)(uintptr_t)(X))
+
 /*
  * Container function.
  * This relies on (compiler) implementation-defined behavior.
diff --git a/include/gcc/ck_cc.h b/include/gcc/ck_cc.h
index e504ccb..481a314 100644
--- a/include/gcc/ck_cc.h
+++ b/include/gcc/ck_cc.h
@@ -57,6 +57,8 @@
 #define CK_CC_INLINE CK_CC_UNUSED
 #endif
 
+#define CK_CC_RESTRICT restrict
+
 /*
  * Packed attribute.
  */