diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d44ad8be801..3ae73f21560 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-15  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000-builtin.def (BU_FUTURE_MISC_2): Also require
+	RS6000_BTM_POWERPC64.
+
 2020-05-15  Uroš Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (SWI48DWI): New mode iterator.
diff --git a/gcc/config/rs6000/rs6000-builtin.def b/gcc/config/rs6000/rs6000-builtin.def
index e58edec47da..8b1ddb00045 100644
--- a/gcc/config/rs6000/rs6000-builtin.def
+++ b/gcc/config/rs6000/rs6000-builtin.def
@@ -1036,7 +1036,8 @@
 #define BU_FUTURE_MISC_2(ENUM, NAME, ATTR, ICODE)			\
   RS6000_BUILTIN_2 (FUTURE_BUILTIN_ ## ENUM,		/* ENUM */	\
 		    "__builtin_" NAME,			/* NAME */	\
-		    RS6000_BTM_FUTURE,			/* MASK */	\
+		    RS6000_BTM_FUTURE					\
+		    | RS6000_BTM_POWERPC64,		/* MASK */	\
 		    (RS6000_BTC_ ## ATTR		/* ATTR */	\
 		     | RS6000_BTC_BINARY),				\
 		    CODE_FOR_ ## ICODE)			/* ICODE */