diff --git a/man3/strsignal.3 b/man3/strsignal.3
index 6a5a1e610..bc4120303 100644
--- a/man3/strsignal.3
+++ b/man3/strsignal.3
@@ -36,8 +36,8 @@ strsignal, sigdescr_np, sigdescr_np, sys_siglist \- return string describing sig
 .B #include <string.h>
 .PP
 .BI "char *strsignal(int " sig );
-.BI "char *sigdescr_np(int " sig );
-.BI "char *sigabbrev_np(int " sig );
+.BI "const char *sigdescr_np(int " sig );
+.BI "const char *sigabbrev_np(int " sig );
 .PP
 .BI "extern const char *const " sys_siglist [];
 .fi