diff --git a/Ast/src/Lexer.cpp b/Ast/src/Lexer.cpp
index 3e2f23e6..f24ff332 100644
--- a/Ast/src/Lexer.cpp
+++ b/Ast/src/Lexer.cpp
@@ -597,6 +597,8 @@ const Lexeme& Lexer::nextInterpolatedString()
 
 Lexeme Lexer::readInterpolatedStringBegin()
 {
+    LUAU_ASSERT(peekch() == '`');
+
     Position start = position();
     consume();