diff --git a/src/common/filefn.cpp b/src/common/filefn.cpp
index 0df53ba158..329a52695c 100644
--- a/src/common/filefn.cpp
+++ b/src/common/filefn.cpp
@@ -913,7 +913,7 @@ wxString wxMacFSSpec2MacFilename( const FSSpec *spec )
     int         i;
     int         j;
     OSErr       theErr;
-    OSStatus    theStatus;
+    OSStatus    theStatus = noErr;
     Boolean     isDirectory = FALSE;
     Str255    theParentPath = "\p";
     FSSpec      theParentSpec;
diff --git a/src/mac/carbon/scrolbar.cpp b/src/mac/carbon/scrolbar.cpp
index 680bc2f33d..3b08c25ecc 100644
--- a/src/mac/carbon/scrolbar.cpp
+++ b/src/mac/carbon/scrolbar.cpp
@@ -116,7 +116,7 @@ void wxScrollBar::MacHandleControlClick( WXWidget control , wxInt16 controlpart
     int maxPos = GetControl32BitMaximum( (ControlHandle) m_macControl) ;
     
     wxEventType scrollEvent = wxEVT_NULL;
-    int nScrollInc;
+    int nScrollInc = 0;
     
     // all events have already been reported during mouse down, except for THUMBRELEASE
     if ( !mouseStillDown && controlpart !=kControlIndicatorPart )
diff --git a/src/mac/scrolbar.cpp b/src/mac/scrolbar.cpp
index 680bc2f33d..3b08c25ecc 100644
--- a/src/mac/scrolbar.cpp
+++ b/src/mac/scrolbar.cpp
@@ -116,7 +116,7 @@ void wxScrollBar::MacHandleControlClick( WXWidget control , wxInt16 controlpart
     int maxPos = GetControl32BitMaximum( (ControlHandle) m_macControl) ;
     
     wxEventType scrollEvent = wxEVT_NULL;
-    int nScrollInc;
+    int nScrollInc = 0;
     
     // all events have already been reported during mouse down, except for THUMBRELEASE
     if ( !mouseStillDown && controlpart !=kControlIndicatorPart )