diff --git a/modules/LibC.core b/modules/LibC.core
new file mode 100644
index 0000000..01f3249
--- /dev/null
+++ b/modules/LibC.core
@@ -0,0 +1,5 @@
+size_t :: U64
+
+malloc :: #foreign (size: size_t): *void
+realloc :: #foreign (ptr: *void, size: size_t): *void
+free :: #foreign (ptr: *void)