diff --git a/src/regexp.c b/src/regexp.c
index e1f6484..de066a1 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -358,6 +358,8 @@
 static int re_mult_next(char *what);
 
 static char_u e_missingbracket[] = N_("E769: Missing ] after %s[");
+static char_u e_reverse_range[] = N_("E944: Reverse range in character class");
+static char_u e_large_class[] = N_("E945: Range too large in character class");
 static char_u e_unmatchedpp[] = N_("E53: Unmatched %s%%(");
 static char_u e_unmatchedp[] = N_("E54: Unmatched %s(");
 static char_u e_unmatchedpar[] = N_("E55: Unmatched %s)");
@@ -2426,14 +2428,14 @@
 				endc = coll_get_char();
 
 			    if (startc > endc)
-				EMSG_RET_NULL(_(e_invrange));
+				EMSG_RET_NULL(_(e_reverse_range));
 #ifdef FEAT_MBYTE
 			    if (has_mbyte && ((*mb_char2len)(startc) > 1
 						 || (*mb_char2len)(endc) > 1))
 			    {
-				/* Limit to a range of 256 chars */
+				/* Limit to a range of 256 chars. */
 				if (endc > startc + 256)
-				    EMSG_RET_NULL(_(e_invrange));
+				    EMSG_RET_NULL(_(e_large_class));
 				while (++startc <= endc)
 				    regmbc(startc);
 			    }