diff --git a/gcc/config/aarch64/atomics.md b/gcc/config/aarch64/atomics.md
index 9670bef7d8cb2b32c5146536d806a7e8bdffb2e3..1805012c9e96d319ee2d510b33db0e0b20e214c2 100644
--- a/gcc/config/aarch64/atomics.md
+++ b/gcc/config/aarch64/atomics.md
@@ -711,7 +711,7 @@ (define_insn "*aarch64_atomic_load<ALLX:mode>_rcpc_zext"
         [(match_operand:ALLX 1 "aarch64_sync_memory_operand" "Q")
          (match_operand:SI 2 "const_int_operand")]			;; model
        UNSPECV_LDAP)))]
-  "TARGET_RCPC"
+  "TARGET_RCPC && (<GPI:sizen> > <ALLX:sizen>)"
   "ldapr<ALLX:atomic_sfx>\t%<GPI:w>0, %1"
 )
 
@@ -722,7 +722,7 @@ (define_insn "*aarch64_atomic_load<ALLX:mode>_rcpc_sext"
         [(match_operand:ALLX 1 "aarch64_sync_memory_operand" "Q")
          (match_operand:SI 2 "const_int_operand")]			;; model
        UNSPECV_LDAP)))]
-  "TARGET_RCPC"
+  "TARGET_RCPC && (<GPI:sizen> > <ALLX:sizen>)"
   "ldaprs<ALLX:atomic_sfx>\t%<GPI:w>0, %1"
 )