diff --git a/luna/include/luna/SystemError.h b/luna/include/luna/SystemError.h
index 0c952b57..16bef760 100644
--- a/luna/include/luna/SystemError.h
+++ b/luna/include/luna/SystemError.h
@@ -52,7 +52,8 @@
 #define ETIMEDOUT 110   // Connection timed out
 #define EALREADY 114    // Operation already in progress
 
-// This one is Luna-specific.
+// These ones are Luna-specific.
 #define EFIXME 342 // Functionality not yet implemented
+#define ENONE 343  // Internal or insignificant error
 
 const char* error_string(int error);
\ No newline at end of file
diff --git a/luna/src/SystemError.cpp b/luna/src/SystemError.cpp
index 2e1f63ad..27aa0853 100644
--- a/luna/src/SystemError.cpp
+++ b/luna/src/SystemError.cpp
@@ -55,6 +55,7 @@ const char* error_string(int error)
     case ETIMEDOUT: return "Connection timed out";
     case EALREADY: return "Operation already in progress";
     case EFIXME: return "Functionality not yet implemented";
+    case ENONE: return "Internal or insignificant error";
     default: return "Unknown error";
     }
 }
\ No newline at end of file