diff --git a/clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
index 32a2deab871c7..3b36565681a7f 100644
--- a/clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp
@@ -2274,7 +2274,7 @@ void StdLibraryFunctionsChecker::initFunctionSummaries(
     addToFunctionSummaryMap(
         "ftell", Signature(ArgTypes{FilePtrTy}, RetType{LongTy}),
         Summary(NoEvalCall)
-            .Case({ReturnValueCondition(WithinRange, Range(1, LongMax))},
+            .Case({ReturnValueCondition(WithinRange, Range(0, LongMax))},
                   ErrnoUnchanged, GenericSuccessMsg)
             .Case(ReturnsMinusOne, ErrnoNEZeroIrrelevant, GenericFailureMsg)
             .ArgConstraint(NotNull(ArgNo(0))));