diff --git a/litex/soc/cores/cpu/microwatt/core.py b/litex/soc/cores/cpu/microwatt/core.py
index f8202d3b8..9fd41ea00 100644
--- a/litex/soc/cores/cpu/microwatt/core.py
+++ b/litex/soc/cores/cpu/microwatt/core.py
@@ -21,6 +21,10 @@ class Microwatt(CPU):
     linker_output_format = "elf64-powerpc64le"
     io_regions           = {0xc0000000: 0x10000000} # origin, length
 
+    @property
+    def mem_map(self):
+        return {"csr": 0xc0000000}
+
     @property
     def gcc_flags(self):
         flags  = "-m64 "