diff --git a/compiler-rt/include/fuzzer/FuzzedDataProvider.h b/compiler-rt/include/fuzzer/FuzzedDataProvider.h
index 6cbfc39bc20b9..71cb427ec4a97 100644
--- a/compiler-rt/include/fuzzer/FuzzedDataProvider.h
+++ b/compiler-rt/include/fuzzer/FuzzedDataProvider.h
@@ -390,7 +390,7 @@ TS FuzzedDataProvider::ConvertUnsignedToSigned(TU value) {
     return static_cast<TS>(value);
   } else {
     constexpr auto TS_min = std::numeric_limits<TS>::min();
-    return TS_min + static_cast<char>(value - TS_min);
+    return TS_min + static_cast<TS>(value - TS_min);
   }
 }