diff --git a/include/vm_segment.h b/include/vm_segment.h
index deb00bb..2ae1eda 100644
--- a/include/vm_segment.h
+++ b/include/vm_segment.h
@@ -54,7 +54,7 @@ struct vm_segment {
 };
 
 extern int vm_segment_copy(vm_segment *, vm_segment *, size_t, size_t, size_t);
-extern int vm_segment_fread(vm_segment *, FILE *, size_t);
+extern int vm_segment_fread(vm_segment *, FILE *, size_t, size_t);
 extern int vm_segment_read_map(vm_segment *, size_t, vm_segment_read_fn);
 extern int vm_segment_set(vm_segment *, size_t, vm_8bit);
 extern int vm_segment_write_map(vm_segment *, size_t, vm_segment_write_fn);
diff --git a/src/vm_segment.c b/src/vm_segment.c
index 2c5c7f9..ffa4e0d 100644
--- a/src/vm_segment.c
+++ b/src/vm_segment.c
@@ -226,9 +226,9 @@ vm_segment_write_map(vm_segment *segment,
  * for some reason, signal that and return an error.
  */
 int
-vm_segment_fread(vm_segment *segment, FILE *stream, size_t len)
+vm_segment_fread(vm_segment *segment, FILE *stream, size_t offset, size_t len)
 {
-    fread(segment->memory, sizeof(vm_8bit), len, stream);
+    fread(segment->memory + offset, sizeof(vm_8bit), len, stream);
 
     // fread() may return zero in the case of an error, but it may
     // return a positive non-zero number short of len; we can't quite