diff --git a/libc/decl/errno_values.h b/libc/decl/errno_values.h
index 939468d5..3f6866e1 100644
--- a/libc/decl/errno_values.h
+++ b/libc/decl/errno_values.h
@@ -71,6 +71,7 @@
 #define ENOPROTOOPT 79
 #define ENOTCONN 80
 #define EDEADLK 81
+#define ENFILE 82
 
 #define EOPNOTSUPP ENOTSUP
 
diff --git a/libc/strerror.cpp b/libc/strerror.cpp
index 71058284..98bff118 100644
--- a/libc/strerror.cpp
+++ b/libc/strerror.cpp
@@ -100,6 +100,7 @@ extern "C" const char* sortix_strerror(int errnum)
 	case ENOPROTOOPT: return "Protocol not available";
 	case ENOTCONN: return "Socket is not connected";
 	case EDEADLK: return "Resource deadlock avoided";
+	case ENFILE: return "Too many open files in system";
 	default: return "Unknown error condition";
 	}
 }