diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index d65d171a4c2..23c336251eb 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -15954,7 +15954,7 @@ namespace ts {
             const block = <Block | ModuleBlock | SourceFile>findAncestor(node, isFunctionOrModuleBlock);
             const sourceFile = getSourceFileOfNode(node);
             const span = getSpanOfTokenAtPosition(sourceFile, block.statements.pos);
-            diagnostics.add(createFileDiagnostic(sourceFile, span.start, span.length, Diagnostics.The_containing_function_or_module_body_is_too_large_for_control_flow_analysis));
+            diagnostics.add(createFileDiagnostic(sourceFile, span.start, span.length, Diagnostics.The_containing_function_or_module_body_is_too_complex_for_control_flow_analysis));
         }
 
         function getFlowTypeOfReference(reference: Node, declaredType: Type, initialType = declaredType, flowContainer?: Node, couldBeUninitialized?: boolean) {
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 7717f51bd50..a04b76421cc 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2044,7 +2044,7 @@
         "category": "Error",
         "code": 2562
     },
-    "The containing function or module body is too large for control flow analysis.": {
+    "The containing function or module body is too complex for control flow analysis.": {
         "category": "Error",
         "code": 2563
     },