diff --git a/src/memory.rs b/src/memory.rs
index c563e84a90c5..6878fbdce6b0 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -119,7 +119,8 @@ pub fn copy(&mut self, src: Pointer, dest: Pointer, size: usize) -> EvalResult<(
 
             for &mut (ref mut offset, _) in &mut relocations {
                 alloc.relocations.remove(offset);
-                *offset += dest.offset - src.offset;
+                *offset += dest.offset;
+                *offset -= src.offset;
             }
 
             (bytes, relocations)