diff --git a/core/runtime/procs.odin b/core/runtime/procs.odin
new file mode 100644
index 000000000..0aaf49928
--- /dev/null
+++ b/core/runtime/procs.odin
@@ -0,0 +1,13 @@
+package runtime
+
+@(link_name="memset")
+memset :: proc "c" (ptr: rawptr, val: i32, len: int) -> rawptr #no_bounds_check {
+	if ptr != nil && len != 0 {
+		b := byte(val)
+		p := ([^]byte)(ptr)
+		for i in 0..<len {
+			p[i] = b
+		}
+	}
+	return ptr
+}
\ No newline at end of file