diff --git a/lib/libsysdecode/flags.c b/lib/libsysdecode/flags.c
index 957b4a95e666..5ba197438452 100644
--- a/lib/libsysdecode/flags.c
+++ b/lib/libsysdecode/flags.c
@@ -1277,3 +1277,10 @@ sysdecode_sctp_sinfo_flags(FILE *fp, int sinfo_flags)
 		}
 	}
 }
+
+bool
+sysdecode_shmflags(FILE *fp, int flags, int *rem)
+{
+
+	return (print_mask_0(fp, shmflags, flags, rem));
+}
diff --git a/lib/libsysdecode/mktables b/lib/libsysdecode/mktables
index 4765ca5d8beb..c85cd8657230 100644
--- a/lib/libsysdecode/mktables
+++ b/lib/libsysdecode/mktables
@@ -165,6 +165,7 @@ if [ -e "${include_dir}/x86/sysarch.h" ]; then
 else
 	gen_table "sysarchnum" "[A-Z_]+[[:space:]]+[0-9]+"                 "machine/sysarch.h"
 fi
+gen_table "shmflags"  "SHM_[A-Z_]+[[:space:]]+0x[0-9]+"                    "sys/mman.h"         "SHM_ANON"
 
 # Generate a .depend file for our output file
 if [ -n "$output_file" ]; then
diff --git a/lib/libsysdecode/sysdecode.h b/lib/libsysdecode/sysdecode.h
index 218943245b66..a01ac1243aa2 100644
--- a/lib/libsysdecode/sysdecode.h
+++ b/lib/libsysdecode/sysdecode.h
@@ -128,5 +128,6 @@ const char *sysdecode_vmresult(int _result);
 bool	sysdecode_wait4_options(FILE *_fp, int _options, int *_rem);
 bool	sysdecode_wait6_options(FILE *_fp, int _options, int *_rem);
 const char *sysdecode_whence(int _whence);
+bool	sysdecode_shmflags(FILE *_fp, int _flags, int *_rem);
 
 #endif /* !__SYSDECODE_H__ */