diff --git a/src/win/win_d3d.cpp b/src/win/win_d3d.cpp
index 1c5cbc0..2b87e1e 100644
--- a/src/win/win_d3d.cpp
+++ b/src/win/win_d3d.cpp
@@ -288,7 +288,7 @@ d3d_blit(int x, int y, int y1, int y2, int w, int h)
 {
     HRESULT hr = D3D_OK;
     HRESULT hbsr = D3D_OK;
-    VOID* pVoid;
+    VOID* pVoid = 0;
     D3DLOCKED_RECT dr;
     RECT r;
     int yy;
diff --git a/src/win/win_settings.c b/src/win/win_settings.c
index 5a4cd91..bf95b5e 100644
--- a/src/win/win_settings.c
+++ b/src/win/win_settings.c
@@ -3603,7 +3603,7 @@ static BOOL CALLBACK
 #endif
 win_settings_hard_disks_proc(HWND hdlg, UINT message, WPARAM wParam, LPARAM lParam)
 {
-	HWND h;
+	HWND h = INVALID_HANDLE_VALUE;
 	int old_sel = 0;
 	int b = 0;
 	int assign = 0;
@@ -4646,7 +4646,7 @@ static BOOL CALLBACK
 #endif
 win_settings_floppy_drives_proc(HWND hdlg, UINT message, WPARAM wParam, LPARAM lParam)
 {
-	HWND h;
+	HWND h = INVALID_HANDLE_VALUE;
 	int i = 0;
 	int old_sel = 0;
 	WCHAR szText[256];
@@ -4781,7 +4781,7 @@ static BOOL CALLBACK
 #endif
 win_settings_other_removable_devices_proc(HWND hdlg, UINT message, WPARAM wParam, LPARAM lParam)
 {
-	HWND h;
+	HWND h = INVALID_HANDLE_VALUE;
 	int old_sel = 0;
 	int b = 0;
 	int b2 = 0;
diff --git a/src/win/win_ui.c b/src/win/win_ui.c
index ccad080..a8fa7ae 100644
--- a/src/win/win_ui.c
+++ b/src/win/win_ui.c
@@ -763,7 +763,7 @@ ui_init(int nCmdShow)
     WCHAR title[200];
     WNDCLASSEX wincl;			/* buffer for main window's class */
     MSG messages;			/* received-messages buffer */
-    HWND hwnd;				/* handle for our window */
+    HWND hwnd = 0;        	/* handle for our window */
     HACCEL haccel;			/* handle to accelerator table */
     int bRet;