diff --git a/libc/decl/errno_values.h b/libc/decl/errno_values.h
index 5537bf60..dc658410 100644
--- a/libc/decl/errno_values.h
+++ b/libc/decl/errno_values.h
@@ -66,6 +66,7 @@
 #define ENETDOWN 74
 #define ENETRESET 75
 #define ENETUNREACH 76
+#define ENOBUFS 77
 
 #define EOPNOTSUPP ENOTSUP
 
diff --git a/libc/strerror.cpp b/libc/strerror.cpp
index 38ba5953..840af23b 100644
--- a/libc/strerror.cpp
+++ b/libc/strerror.cpp
@@ -95,6 +95,7 @@ extern "C" const char* sortix_strerror(int errnum)
 	case ENETDOWN: return "Network is down";
 	case ENETRESET: return "Connection aborted by network";
 	case ENETUNREACH: return "Network is unreachable";
+	case ENOBUFS: return "No buffer space available";
 	default: return "Unknown error condition";
 	}
 }