diff --git a/man7/signal.7 b/man7/signal.7
index 26a8ff9c1..e913e6019 100644
--- a/man7/signal.7
+++ b/man7/signal.7
@@ -344,6 +344,7 @@ is synonymous with
 .B SIGSYS
 on most architectures.
 .SS Real-time signals
+Starting with version 2.2,
 Linux supports real-time signals as originally defined in the POSIX.1b
 real-time extensions (and now included in POSIX.1-2001).
 The range of supported real-time signals is defined by the macros