diff --git a/man3/getauxval.3 b/man3/getauxval.3
index 456371c6a..bcc116dd2 100644
--- a/man3/getauxval.3
+++ b/man3/getauxval.3
@@ -60,9 +60,10 @@ values are present on all architectures.
 The base address of the program interpreter (usually, the dynamic linker).
 .TP
 .BR AT_BASE_PLATFORM
-A pointer to a string identifying the real platform; may differ from
-.BR AT_PLATFORM
-(PowerPC only).
+A pointer to a string (PowerPC and MIPS only).
+On PowerPC, this identifies the real platform; may differ from
+.BR AT_PLATFORM "."
+On MIPS, this identifies the ISA level (Since 5.7).
 .TP
 .BR AT_CLKTCK
 The frequency with which