diff --git a/src/gdbstub.rs b/src/gdbstub.rs
index b7a72da..d9c2df3 100644
--- a/src/gdbstub.rs
+++ b/src/gdbstub.rs
@@ -206,7 +206,7 @@ impl<'a> GDBStub<'a> {
                                 <memory type='flash' start='0' length='0x{:X}'>\n\
                                 <property name='blocksize'>0x80</property>\n\
                                 </memory></memory-map>",
-                                self.chip.rom.len(), self.chip.ram.len()
+                                self.chip.ram.len(), self.chip.rom.len()
                             ).to_string().into();
                         },
                         "C" => response = "01".into(),