diff --git a/src/libs/vmisc/stable.h b/src/libs/vmisc/stable.h
index 3a680c9d3..118223430 100644
--- a/src/libs/vmisc/stable.h
+++ b/src/libs/vmisc/stable.h
@@ -45,6 +45,10 @@
 #   include <QtGui>
 #endif
 
+#ifdef QT_GUI_LIB
+#   include <QtWidgets>
+#endif
+
 #endif/*__cplusplus*/
 
 #endif // STABLE_H
diff --git a/src/libs/vmisc/warnings.pri b/src/libs/vmisc/warnings.pri
index 3471c965d..57118c95d 100644
--- a/src/libs/vmisc/warnings.pri
+++ b/src/libs/vmisc/warnings.pri
@@ -4,7 +4,7 @@ unix {
         QMAKE_CXXFLAGS += \
             # Key -isystem disable checking errors in system headers.
             -isystem "$${OUT_PWD}/$${MOC_DIR}" \
-            -isystem "$${OUT_PWD}/$${MOC_DIR}" \
+            -isystem "$${OUT_PWD}/$${UI_DIR}" \
             $$GCC_DEBUG_CXXFLAGS # See common.pri for more details.
 
         checkWarnings{ # For enable run qmake with CONFIG+=checkWarnings
@@ -29,7 +29,7 @@ unix {
         QMAKE_CXXFLAGS += \
             # Key -isystem disable checking errors in system headers.
             -isystem "$${OUT_PWD}/$${MOC_DIR}" \
-            -isystem "$${OUT_PWD}/$${MOC_DIR}" \
+            -isystem "$${OUT_PWD}/$${UI_DIR}" \
             $$CLANG_DEBUG_CXXFLAGS # See common.pri for more details.
 
         checkWarnings{ # For enable run qmake with CONFIG+=checkWarnings
@@ -46,7 +46,7 @@ unix {
     *-icc-*{
         QMAKE_CXXFLAGS += \
             -isystem "$${OUT_PWD}/$${MOC_DIR}" \
-            -isystem "$${OUT_PWD}/$${MOC_DIR}" \
+            -isystem "$${OUT_PWD}/$${UI_DIR}" \
             $$ICC_DEBUG_CXXFLAGS
 
         checkWarnings{ # For enable run qmake with CONFIG+=checkWarnings