diff --git a/packages/react-devtools-shared/src/__tests__/utils-test.js b/packages/react-devtools-shared/src/__tests__/utils-test.js
index 83b31903e06..dacbe0f46b9 100644
--- a/packages/react-devtools-shared/src/__tests__/utils-test.js
+++ b/packages/react-devtools-shared/src/__tests__/utils-test.js
@@ -401,7 +401,7 @@ Object.defineProperty(exports, "__esModule", { value: true });
 exports.f = f;
 function f() { }
 //# sourceMappingURL=`;
-    const result = ['', 'http://test/a.mts', 1, 16];
+    const result = ['', 'http://test/a.mts', 1, 17];
     const fs = {
       'http://test/a.mts': `export function f() {}`,
       'http://test/a.mjs.map': `{"version":3,"file":"a.mjs","sourceRoot":"","sources":["a.mts"],"names":[],"mappings":";;AAAA,cAAsB;AAAtB,SAAgB,CAAC,KAAI,CAAC"}`,
diff --git a/packages/react-devtools-shared/src/symbolicateSource.js b/packages/react-devtools-shared/src/symbolicateSource.js
index e5f469a21a5..49a30984c28 100644
--- a/packages/react-devtools-shared/src/symbolicateSource.js
+++ b/packages/react-devtools-shared/src/symbolicateSource.js
@@ -82,12 +82,14 @@ export async function symbolicateSource(
           const {
             sourceURL: possiblyURL,
             line,
-            column,
+            column: columnZeroBased,
           } = consumer.originalPositionFor({
             lineNumber, // 1-based
             columnNumber, // 1-based
           });
 
+          const column = columnZeroBased + 1;
+
           if (possiblyURL === null) {
             return null;
           }