diff --git a/interface/wx/utils.h b/interface/wx/utils.h
index b241060a96..1d17b6986e 100644
--- a/interface/wx/utils.h
+++ b/interface/wx/utils.h
@@ -995,6 +995,9 @@ bool wxIsPlatformLittleEndian();
     "arm64", or "i86pc". The name for the same CPU running on the same
     hardware can vary across operating systems.
 
+    The returned string may be empty if the CPU architecture couldn't be
+    recognized.
+
     @since 3.1.5
 */
 wxString wxGetCpuArchitectureName();
diff --git a/src/msw/utils.cpp b/src/msw/utils.cpp
index 053f7e2c54..6090e1351d 100644
--- a/src/msw/utils.cpp
+++ b/src/msw/utils.cpp
@@ -1297,7 +1297,7 @@ wxString wxGetCpuArchitectureName()
 
     case PROCESSOR_ARCHITECTURE_UNKNOWN:
     default:
-        return "Unknown";
+        return wxString();
     }
 }