diff --git a/common.pri b/common.pri
index f3b70cacb..43bc542f8 100644
--- a/common.pri
+++ b/common.pri
@@ -278,7 +278,7 @@ GCC_DEBUG_CXXFLAGS += \
 #    -Winline \
     -Winvalid-pch \
 #    -Wunsafe-loop-optimizations \
-    -Wlong-long \
+#    -Wlong-long \ We have been using C++11
     -Wmissing-format-attribute \
     -Wswitch-default \
     -Wuninitialized \
@@ -517,7 +517,7 @@ CLANG_DEBUG_CXXFLAGS += \
         -Wno-c++98-compat-local-type-template-args \
     -Wlogical-not-parentheses \
     -Wlogical-op-parentheses \
-    -Wlong-long \
+#    -Wlong-long \ We have been using C++11
     -Wloop-analysis \
     -Wmain \
     -Wmain-return-type \
diff --git a/src/libs/vlayout/warnings.pri b/src/libs/vlayout/warnings.pri
index f80effc8d..29c54daef 100644
--- a/src/libs/vlayout/warnings.pri
+++ b/src/libs/vlayout/warnings.pri
@@ -11,11 +11,6 @@ unix {
             QMAKE_CXXFLAGS += -Werror
         }
 
-        # -isystem key works only for headers. In some cases it's not enough. But we can't delete these warnings and
-        # want them in the global list. Compromise decision is to delete them from the local list.
-        QMAKE_CXXFLAGS -= \
-            -Wlong-long \
-
         noAddressSanitizer{ # For enable run qmake with CONFIG+=noAddressSanitizer
             # do nothing
         } else {