diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6b266b4..29ab19e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,7 +99,7 @@ if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   # using GCC
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic -Wno-long-long")
 endif()
 
 IF(JSONCPP_WITH_WARNING_AS_ERROR)
diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index 9f9d4de..15e0304 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -1265,7 +1265,7 @@ bool OurReader::readStringSingleQuote() {
   return c == '\'';
 }
 
-bool OurReader::readObject(Token& tokenStart) {
+bool OurReader::readObject(Token& /*tokenStart*/) {
   Token tokenName;
   std::string name;
   Value init(objectValue);
@@ -1326,7 +1326,7 @@ bool OurReader::readObject(Token& tokenStart) {
       "Missing '}' or object member name", tokenName, tokenObjectEnd);
 }
 
-bool OurReader::readArray(Token& tokenStart) {
+bool OurReader::readArray(Token& /*tokenStart*/) {
   Value init(arrayValue);
   currentValue().swapPayload(init);
   skipSpaces();