diff --git a/src/errors.h b/src/errors.h
index a116505..ca5ec85 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -3660,5 +3660,7 @@
 	INIT(= N_("E1513: Cannot switch buffer. 'winfixbuf' is enabled"));
 EXTERN char e_invalid_return_type_from_findfunc[]
 	INIT(= N_("E1514: 'findfunc' did not return a List type"));
-EXTERN char e_str_encoding_failed[]
-	INIT(= N_("E1515: Unable to convert %s '%s' encoding"));
+EXTERN char e_str_encoding_from_failed[]
+	INIT(= N_("E1515: Unable to convert from '%s' encoding"));
+EXTERN char e_str_encoding_to_failed[]
+	INIT(= N_("E1516: Unable to convert to '%s' encoding"));
diff --git a/src/strings.c b/src/strings.c
index 640ad39..d6f1b38 100644
--- a/src/strings.c
+++ b/src/strings.c
@@ -1339,7 +1339,7 @@
 	    vim_free(str);
 	    if (converted_str == NULL)
 	    {
-		semsg(_(e_str_encoding_failed), "from", from_encoding);
+		semsg(_(e_str_encoding_from_failed), from_encoding);
 		goto done;
 	    }
 	}
@@ -1348,7 +1348,7 @@
 	{
 	    if (!utf_valid_string(converted_str, NULL))
 	    {
-		semsg(_(e_str_encoding_failed), "from", p_enc);
+		semsg(_(e_str_encoding_from_failed), p_enc);
 		vim_free(converted_str);
 		goto done;
 	    }
@@ -1414,7 +1414,7 @@
 	    str = convert_string(str, p_enc, to_encoding);
 	    if (str == NULL)
 	    {
-		semsg(_(e_str_encoding_failed), "to", to_encoding);
+		semsg(_(e_str_encoding_to_failed), to_encoding);
 		goto done;
 	    }
 	}
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index 724fda0..c498ec0 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -4422,10 +4422,10 @@
 
     call assert_fails("call str2blob(['abc'], [])", 'E1206: Dictionary required for argument 2')
     call assert_fails("call str2blob(['abc'], {'encoding': []})", 'E730: Using a List as a String')
-    call assert_fails("call str2blob(['abc'], {'encoding': 'ab12xy'})", 'E1515: Unable to convert to ''ab12xy'' encoding')
-    call assert_fails("call str2blob(['ŝş'], {'encoding': 'latin1'})", 'E1515: Unable to convert to ''latin1'' encoding')
-    call assert_fails("call str2blob(['அஇ'], {'encoding': 'latin1'})", 'E1515: Unable to convert to ''latin1'' encoding')
-    call assert_fails("call str2blob(['🁰🁳'], {'encoding': 'latin1'})", 'E1515: Unable to convert to ''latin1'' encoding')
+    call assert_fails("call str2blob(['abc'], {'encoding': 'ab12xy'})", 'E1516: Unable to convert to ''ab12xy'' encoding')
+    call assert_fails("call str2blob(['ŝş'], {'encoding': 'latin1'})", 'E1516: Unable to convert to ''latin1'' encoding')
+    call assert_fails("call str2blob(['அஇ'], {'encoding': 'latin1'})", 'E1516: Unable to convert to ''latin1'' encoding')
+    call assert_fails("call str2blob(['🁰🁳'], {'encoding': 'latin1'})", 'E1516: Unable to convert to ''latin1'' encoding')
   END
   call v9.CheckLegacyAndVim9Success(lines)
 endfunc
diff --git a/src/version.c b/src/version.c
index ee5b5ed..b4f6312 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1223,
+/**/
     1222,
 /**/
     1221,