diff --git a/uppsrc/CtrlCore/Ctrl.cpp b/uppsrc/CtrlCore/Ctrl.cpp
index dd9cc08be..9a1d395a9 100644
--- a/uppsrc/CtrlCore/Ctrl.cpp
+++ b/uppsrc/CtrlCore/Ctrl.cpp
@@ -964,6 +964,7 @@ CH_INT(GUI_AltAccessKeys, 1);
 CH_INT(GUI_AKD_Conservative, 0);
 CH_INT(GUI_DragDistance, 4);
 CH_INT(GUI_DblClickTime, 500);
+CH_INT(GUI_WheelScrollLines, 3);
 
 String Ctrl::Name0() const {
 	GuiLock __;
diff --git a/uppsrc/CtrlCore/CtrlCore.h b/uppsrc/CtrlCore/CtrlCore.h
index 01e984d4a..721f7c071 100644
--- a/uppsrc/CtrlCore/CtrlCore.h
+++ b/uppsrc/CtrlCore/CtrlCore.h
@@ -1301,6 +1301,7 @@ int GUI_AltAccessKeys();
 int GUI_AKD_Conservative();
 int GUI_DragDistance();
 int GUI_DblClickTime();
+int GUI_WheelScrollLines();
 
 void GUI_GlobalStyle_Write(int);
 void GUI_DragFullWindow_Write(int);
@@ -1311,6 +1312,7 @@ void GUI_AltAccessKeys_Write(int);
 void GUI_AKD_Conservative_Write(int);
 void GUI_DragDistance_Write(int);
 void GUI_DblClickTime_Write(int);
+void GUI_WheelScrollLines_Write(int);
 
 void  EditFieldIsThin_Write(int);
 void  TopSeparator1_Write(Value);
diff --git a/uppsrc/CtrlLib/ChWin32.cpp b/uppsrc/CtrlLib/ChWin32.cpp
index ec42c3381..02f6eefd3 100644
--- a/uppsrc/CtrlLib/ChWin32.cpp
+++ b/uppsrc/CtrlLib/ChWin32.cpp
@@ -607,6 +607,10 @@ void ChSysInit()
 	GUI_DragDistance_Write(GetSystemMetrics(SM_CXDRAG));
 	GUI_DblClickTime_Write(GetDoubleClickTime());
 
+	int slines;
+	SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &slines, 0);
+	GUI_WheelScrollLines_Write(slines);
+
 	CtrlImg::Set(CtrlImg::I_information, Win32Icon(IDI_INFORMATION));
 	CtrlImg::Set(CtrlImg::I_question, Win32Icon(IDI_QUESTION));
 	CtrlImg::Set(CtrlImg::I_exclamation, Win32Icon(IDI_EXCLAMATION));
diff --git a/uppsrc/CtrlLib/ScrollBar.cpp b/uppsrc/CtrlLib/ScrollBar.cpp
index bd45ce878..58e907499 100644
--- a/uppsrc/CtrlLib/ScrollBar.cpp
+++ b/uppsrc/CtrlLib/ScrollBar.cpp
@@ -394,8 +394,8 @@ void ScrollBar::NextPage() {
 	Uset(pagepos + max(pagesize - linesize, 1));
 }
 
-void ScrollBar::Wheel(int zdelta, int lines) {
-	Uset(pagepos - lines * linesize * zdelta / 120);
+void ScrollBar::Wheel(int zdelta) {
+	Uset(pagepos - GUI_WheelScrollLines() * linesize * zdelta / 120);
 }
 
 bool ScrollBar::VertKey(dword key, bool homeend) {
diff --git a/uppsrc/CtrlLib/ScrollBar.h b/uppsrc/CtrlLib/ScrollBar.h
index 5342c5baa..902fdbfa8 100644
--- a/uppsrc/CtrlLib/ScrollBar.h
+++ b/uppsrc/CtrlLib/ScrollBar.h
@@ -93,7 +93,7 @@ public:
 	void    Begin();
 	void    End();
 
-	void    Wheel(int zdelta, int lines = 3);
+	void    Wheel(int zdelta);
 
 	Size    GetViewSize() const;
 	Size    GetReducedViewSize() const;
@@ -221,8 +221,8 @@ public:
 	void    HorzBegin()                              { x.Begin(); }
 	void    HorzEnd()                                { x.End(); }
 
-	void    WheelX(int zdelta, int lines = 3)        { x.Wheel(zdelta, lines); }
-	void    WheelY(int zdelta, int lines = 3)        { y.Wheel(zdelta, lines); }
+	void    WheelX(int zdelta)                       { x.Wheel(zdelta); }
+	void    WheelY(int zdelta)                       { y.Wheel(zdelta); }
 
 	Size    GetViewSize() const;
 	Size    GetReducedViewSize() const;