diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 6eecd7a..a4eb95e 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -6884,6 +6884,14 @@
 <			E1505: Invalid format specifier:
 			%1$d at width %2$d is: %01$*2$.3$d
 
+							*E1507*
+		This internal error indicates that the logic to
+		parse a positional format error ran into a problem
+		that couldn't be otherwise reported. Please file a
+		bug against vim if you run into this, copying the
+		exact format string and parameters that were used.
+
+
 prompt_getprompt({buf})					*prompt_getprompt()*
 		Returns the effective prompt text for buffer {buf}.  {buf} can
 		be a buffer name or number.  See |prompt-buffer|.
diff --git a/runtime/doc/tags b/runtime/doc/tags
index c32b679..ca4eaf9 100644
--- a/runtime/doc/tags
+++ b/runtime/doc/tags
@@ -4510,6 +4510,7 @@
 E1504	builtin.txt	/*E1504*
 E1505	builtin.txt	/*E1505*
 E1506	editing.txt	/*E1506*
+E1507	builtin.txt	/*E1507*
 E1508	editing.txt	/*E1508*
 E1509	editing.txt	/*E1509*
 E151	helphelp.txt	/*E151*
diff --git a/src/errors.h b/src/errors.h
index 21495cd..2474e27 100644
--- a/src/errors.h
+++ b/src/errors.h
@@ -3554,10 +3554,9 @@
 	INIT(= N_("E1505: Invalid format specifier: %s"));
 EXTERN char e_xattr_erange[]
 	INIT(= N_("E1506: Buffer too small to copy xattr value or key"));
+EXTERN char e_aptypes_is_null_nr_str[]
+	INIT(= "E1507: Internal error: ap_types or ap_types[idx] is NULL: %d: %s");
 EXTERN char e_xattr_e2big[]
 	INIT(= N_("E1508: Size of the extended attribute value is larger than the maximum size allowed"));
 EXTERN char e_xattr_other[]
 	INIT(= N_("E1509: Error occured when reading or writing extended attribute"));
-// E1507, E1509 - E1519 unused
-EXTERN char e_aptypes_is_null_nr_str[]
-	INIT(= "E1520: Internal error: ap_types or ap_types[idx] is NULL: %d: %s");
diff --git a/src/version.c b/src/version.c
index 64c68d9..0f73dc2 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1990,
+/**/
     1989,
 /**/
     1988,