diff --git a/ets2panda/public/es2panda_lib.cpp b/ets2panda/public/es2panda_lib.cpp
index 0cfb44268eda228fa751bb421fa25ee1c18899e6..8cb204d6c746c38546234f1453418d34710b45ed 100644
--- a/ets2panda/public/es2panda_lib.cpp
+++ b/ets2panda/public/es2panda_lib.cpp
@@ -961,7 +961,7 @@ extern "C" bool IsAnyError(es2panda_Context *context)
 
 extern "C" size_t SourcePositionIndex([[maybe_unused]] es2panda_Context *context, es2panda_SourcePosition *position)
 {
-    return reinterpret_cast<lexer::SourcePosition *>(position)->index;
+    return reinterpret_cast<lexer::SourcePosition *>(position)->ToLocation().col;
 }
 
 extern "C" size_t SourcePositionLine([[maybe_unused]] es2panda_Context *context, es2panda_SourcePosition *position)