diff --git a/libmaxsi/decl/errno_values.h b/libmaxsi/decl/errno_values.h
index a4162881..4a7f0066 100644
--- a/libmaxsi/decl/errno_values.h
+++ b/libmaxsi/decl/errno_values.h
@@ -27,6 +27,7 @@
 #define EBLOCKING 35
 #define EINTR 36
 #define ENOTEMPTY 37
+#define EBUSY 38
 #define ELAKE 41
 
 #endif
diff --git a/libmaxsi/error.cpp b/libmaxsi/error.cpp
index 600c94e1..b4847cf7 100644
--- a/libmaxsi/error.cpp
+++ b/libmaxsi/error.cpp
@@ -75,6 +75,7 @@ namespace Maxsi
 				case EBLOCKING: return (char*) "Operation is blocking";
 				case EINTR: return (char*) "Interrupted function call";
 				case ENOTEMPTY: return (char*) "Directory not empty";
+				case EBUSY: return (char*) "Device or resource busy";
 				case ELAKE: return (char*) "Sit by a lake";
 				default: return (char*) "Unknown error condition";
 			}