diff --git a/Valentina.pro b/Valentina.pro
index fb54f3f3c..aec82f41f 100644
--- a/Valentina.pro
+++ b/Valentina.pro
@@ -64,20 +64,26 @@ win32-msvc* {
 
 CONFIG(debug, debug|release){
     # Debug
-    *-g++{
-    QMAKE_CXXFLAGS += -isystem "/usr/include/qt5" -isystem "/usr/include/qt5/QtWidgets" \
-                      -isystem "/usr/include/qt5/QtXml" -isystem "/usr/include/qt5/QtGui" \
-                      -isystem "/usr/include/qt5/QtCore" -isystem "$${UI_DIR}" -isystem "$${MOC_DIR}" \
-                      -isystem "$${RCC_DIR}" \
-                      -Og -Wall -Wextra -pedantic -Weffc++ -Woverloaded-virtual -Wctor-dtor-privacy \
-                      -Wnon-virtual-dtor -Wold-style-cast -Wconversion -Winit-self \
-                      -Wunreachable-code -Wcast-align -Wcast-qual -Wdisabled-optimization -Wfloat-equal \
-                      -Wformat  -Wformat=2 -Wformat-nonliteral -Wformat-security -Wformat-y2k \
-                      -Winvalid-pch -Wunsafe-loop-optimizations -Wlong-long -Wmissing-format-attribute \
-                      -Wmissing-include-dirs -Wpacked -Wredundant-decls \
-                      -Wswitch-default -Wswitch-enum -Wuninitialized -Wunused-parameter -Wvariadic-macros \
-                      -Wlogical-op -Wnoexcept \
-                      -Wstrict-null-sentinel -Wstrict-overflow=5 -Wundef -Wno-unused -gdwarf-3
+    unix {
+        *-g++{
+        QMAKE_CXXFLAGS += -isystem "/usr/include/qt5" -isystem "/usr/include/qt5/QtWidgets" \
+                          -isystem "/usr/include/qt5/QtXml" -isystem "/usr/include/qt5/QtGui" \
+                          -isystem "/usr/include/qt5/QtCore" -isystem "$${UI_DIR}" -isystem "$${MOC_DIR}" \
+                          -isystem "$${RCC_DIR}" \
+                          -Og -Wall -Wextra -pedantic -Weffc++ -Woverloaded-virtual -Wctor-dtor-privacy \
+                          -Wnon-virtual-dtor -Wold-style-cast -Wconversion -Winit-self \
+                          -Wunreachable-code -Wcast-align -Wcast-qual -Wdisabled-optimization -Wfloat-equal \
+                          -Wformat  -Wformat=2 -Wformat-nonliteral -Wformat-security -Wformat-y2k \
+                          -Winvalid-pch -Wunsafe-loop-optimizations -Wlong-long -Wmissing-format-attribute \
+                          -Wmissing-include-dirs -Wpacked -Wredundant-decls \
+                          -Wswitch-default -Wswitch-enum -Wuninitialized -Wunused-parameter -Wvariadic-macros \
+                          -Wlogical-op -Wnoexcept \
+                          -Wstrict-null-sentinel -Wstrict-overflow=5 -Wundef -Wno-unused -gdwarf-3
+        }
+    } else {
+        *-g++{#Don't use additional GCC keys on Windows system.
+        QMAKE_CXXFLAGS += -Og -Wall -Wextra -pedantic
+        }
     }
 }else{
     # Release