diff --git a/src/AceEditor/madie-ace-editor.test.tsx b/src/AceEditor/madie-ace-editor.test.tsx
index 666b3bb..d99f98b 100644
--- a/src/AceEditor/madie-ace-editor.test.tsx
+++ b/src/AceEditor/madie-ace-editor.test.tsx
@@ -340,8 +340,8 @@ describe("synching the cql", () => {
     expect(updatedContent.isUsingStatementChanged).toEqual(true);
   });
 
-  test("replacing the error containing using content line to actual using content with FHIR", async () => {
-    const expectValue = "using QICore version '4.1.1'";
+  test("Not to replace the using FHIR statement for QICore measure if it is the only using statement", async () => {
+    const expectValue = "using FHIR version '4.0.1'";
     const updatedContent = await updateEditorContent(
       "using FHIR version '4.0.1'",
       "",
diff --git a/src/AceEditor/madie-ace-editor.tsx b/src/AceEditor/madie-ace-editor.tsx
index 6741f3b..e570a9b 100644
--- a/src/AceEditor/madie-ace-editor.tsx
+++ b/src/AceEditor/madie-ace-editor.tsx
@@ -90,9 +90,16 @@ export const updateUsingStatements = (
       measureModel !== name ||
       modelVersion !== version.replace(/["']/g, "")
     ) {
-      parsedEditorCqlCopy.cqlArrayToBeFiltered[
-        start.line - 1
-      ] = `using ${measureModel} version '${modelVersion}'`;
+      // we want to keep FHIR if that's the only using model present for QICore.
+      if (measureModel === "QICore" && name === "FHIR") {
+        parsedEditorCqlCopy.cqlArrayToBeFiltered[
+          start.line - 1
+        ] = `using FHIR version '4.0.1'`;
+      } else {
+        parsedEditorCqlCopy.cqlArrayToBeFiltered[
+          start.line - 1
+        ] = `using ${measureModel} version '${modelVersion}'`;
+      }
       isCqlUpdated = true;
     }
   } else if (usingStatements?.length > 1) {