diff --git a/builtin.c b/builtin.c
index a52a22f6fa86..72860b5a60cb 100644
--- a/builtin.c
+++ b/builtin.c
@@ -285,7 +285,7 @@ XS(XS_builtin_trim)
 
         Copy(start, SvPVX(dest), len, U8);
         SvPVX(dest)[len] = '\0';
-        SvPOK_on(dest);
+        SvPOK_only_UTF8(dest);
         SvCUR_set(dest, len);
 
         if (DO_UTF8(source))
diff --git a/lib/builtin.pm b/lib/builtin.pm
index 5d80564e0c32..51010d5b6222 100644
--- a/lib/builtin.pm
+++ b/lib/builtin.pm
@@ -1,4 +1,4 @@
-package builtin 0.016;
+package builtin 0.017;
 
 use v5.40;
 
diff --git a/lib/builtin.t b/lib/builtin.t
index c4b26ee3640b..8e0d8f152784 100644
--- a/lib/builtin.t
+++ b/lib/builtin.t
@@ -669,6 +669,14 @@ EOS
     }
 }
 
+# github #22784
+{
+    use builtin qw( trim );
+    sub f { 0+trim($_[0]) }
+    is(f(4), 4, "populate TARG.iv");
+    is(f(123), 123, "check TARG.IOK is reset properly");
+}
+
 # vim: tabstop=4 shiftwidth=4 expandtab autoindent softtabstop=4
 
 done_testing();