diff --git a/gcc/ipa-icf-gimple.c b/gcc/ipa-icf-gimple.c
index 3e5b2d4bd6d..fa02809defd 100644
--- a/gcc/ipa-icf-gimple.c
+++ b/gcc/ipa-icf-gimple.c
@@ -37,6 +37,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-eh.h"
 #include "builtins.h"
 #include "cfgloop.h"
+#include "attribs.h"
 
 #include "ipa-icf-gimple.h"
 
@@ -568,6 +569,9 @@ func_checker::compare_gimple_call (gcall *s1, gcall *s2)
       || (fntype1 && !types_compatible_p (fntype1, fntype2)))
     return return_false_with_msg ("call function types are not compatible");
 
+  if (fntype1 && fntype2 && comp_type_attributes (fntype1, fntype2) != 1)
+    return return_false_with_msg ("different fntype attributes");
+
   tree chain1 = gimple_call_chain (s1);
   tree chain2 = gimple_call_chain (s2);
   if ((chain1 && !chain2)