diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f75814..db75e9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -82,6 +82,7 @@ endif ()
 
 file(COPY src/pi9.h src/pi9_string.h DESTINATION include/pi9)
 file(COPY src/chck/buffer/buffer.h src/chck/buffer/endianess.h DESTINATION include/chck/buffer)
+file(COPY src/chck/macro.h DESTINATION include/chck)
 file(COPY src/chck/overflow/overflow.h DESTINATION include/chck/overflow)
 
 if ("${CMAKE_PROJECT_NAME}" STREQUAL "${PROJECT_NAME}")
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 27bb0f1..de6f0ef 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,4 +1,4 @@
-add_library(pi9 pi9.c pi9_string.c chck/buffer/buffer.c chck/buffer/buffer.h chck/buffer/endianess.h chck/overflow.h)
+add_library(pi9 pi9.c pi9_string.c chck/buffer/buffer.c chck/buffer/buffer.h chck/buffer/endianess.h chck/overflow/overflow.h chck/macro.h)
 target_link_libraries(pi9 PRIVATE ${CHCK_LIBRARIES})
 
 # Parse soversion version
diff --git a/src/chck/macros.h b/src/chck/macros.h
new file mode 100644
index 0000000..88762e7
--- /dev/null
+++ b/src/chck/macros.h
@@ -0,0 +1,20 @@
+#ifndef __chck_macros_h__
+#define __chck_macros_h__
+
+#if __GNUC__
+#  if !defined(likely) && !defined(unlikely)
+#     define likely(x) __builtin_expect(!!(x), 1)
+#     define unlikely(x) __builtin_expect(!!(x), 0)
+#  endif
+#  define CHCK_FORMAT(f, x, y) __attribute__((format(f, x, y)))
+#  define CHCK_MALLOC __attribute__((malloc))
+#else
+#  if !defined(likely) && !defined(unlikely)
+#     define likely(x) !!(x)
+#     define unlikely(x) !!(x)
+#  endif
+#  define CHCK_FORMAT(f, x, y)
+#  define CHCK_MALLOC
+#endif
+
+#endif /* __chck_macros_h__ */