diff --git a/core/odin/parser/parser.odin b/core/odin/parser/parser.odin
index b83c9cef2..c9811d04f 100644
--- a/core/odin/parser/parser.odin
+++ b/core/odin/parser/parser.odin
@@ -1129,7 +1129,7 @@ token_precedence :: proc(p: ^Parser, kind: token.Kind) -> int {
 	switch kind {
 	case token.Question:
 		return 1;
-	case token.Ellipsis:
+	case token.Ellipsis, token.Range_Half:
 		if !p.allow_range {
 			return 0;
 		}
diff --git a/core/odin/token/token.odin b/core/odin/token/token.odin
index 7e985d46d..8ce98d1d9 100644
--- a/core/odin/token/token.odin
+++ b/core/odin/token/token.odin
@@ -108,6 +108,7 @@ using Kind :: enum u32 {
 		Period,
 		Comma,
 		Ellipsis,
+		Range_Half,
 		Back_Slash,
 	B_Operator_End,
 
@@ -244,6 +245,7 @@ tokens := [Kind.COUNT]string {
 	".",
 	",",
 	"..",
+	"..<",
 	"\\",
 	"",
 
diff --git a/src/parser.cpp b/src/parser.cpp
index a72bd8803..ba2b704f7 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -2144,9 +2144,9 @@ Ast *parse_call_expr(AstFile *f, Ast *operand) {
 		}
 
 		bool prefix_ellipsis = false;
-		if (is_token_range(f->curr_token)) {
+		if (f->curr_token.kind == Token_Ellipsis) {
 			prefix_ellipsis = true;
-			ellipsis = expect_token(f, f->curr_token.kind);
+			ellipsis = expect_token(f, Token_Ellipsis);
 		}
 
 		Ast *arg = parse_expr(f, false);