diff --git a/misoclib/soc/cpuif.py b/misoclib/soc/cpuif.py
index 7bbe5ad..be58bd8 100644
--- a/misoclib/soc/cpuif.py
+++ b/misoclib/soc/cpuif.py
@@ -72,7 +72,7 @@ def get_csr_header(regions, interrupt_map):
    r = "#ifndef __GENERATED_CSR_H\n#define __GENERATED_CSR_H\n#include <hw/common.h>\n"
    for name, origin, busword, obj in regions:
        if isinstance(obj, Memory):
-           fullname = name + "_" + memory.name_override
+           fullname = name + "_" + obj.name_override
            r += "#define CSR_"+fullname.upper()+"_BASE "+hex(origin)+"\n"
        else:
            r += "\n/* "+name+" */\n"