diff --git a/src/runtime/gc.go b/src/runtime/gc.go
new file mode 100644
index 000000000..c8c1706e9
--- /dev/null
+++ b/src/runtime/gc.go
@@ -0,0 +1,10 @@
+package runtime
+
+// Shared code for the various garbage collectors.
+
+import "unsafe"
+
+// Special alloc function that should never actually be called.
+// It is used instead of normal alloc in //go:noheap functions, and must either
+// be optimized away or throw a linker error.
+func alloc_noheap(size uintptr, layout unsafe.Pointer) unsafe.Pointer
diff --git a/src/runtime/runtime.go b/src/runtime/runtime.go
index 872b225b9..c9b095938 100644
--- a/src/runtime/runtime.go
+++ b/src/runtime/runtime.go
@@ -66,11 +66,6 @@ func llvm_sponentry() unsafe.Pointer
 //export strlen
 func strlen(ptr unsafe.Pointer) uintptr
 
-// Special alloc function that should never actually be called.
-// It is used instead of normal alloc in //go:noheap functions, and must either
-// be optimized away or throw a linker error.
-func alloc_noheap(size uintptr, layout unsafe.Pointer) unsafe.Pointer
-
 //export malloc
 func malloc(size uintptr) unsafe.Pointer