diff --git a/darwin/main.m b/darwin/main.m
index 52537882..184a90c8 100644
--- a/darwin/main.m
+++ b/darwin/main.m
@@ -247,13 +247,13 @@ void uiQueueMain(void (*f)(void *data), void *data)
         int (*f)(void *data);
         void *data;
 }
-- (id)initWithCallback:(int (*)(void *))callback data:(void*)callbackData;
+- (id)initWithCallback:(int (*)(void *))callback data:(void *)callbackData;
 - (void)doTimer:(NSTimer *)timer;
 @end
 
 @implementation uiprivTimerDelegate
 
-- (id)initWithCallback:(int (*)(void *))callback data:(void*)callbackData
+- (id)initWithCallback:(int (*)(void *))callback data:(void *)callbackData
 {
         self = [super init];
         if (self) {
@@ -265,7 +265,7 @@ void uiQueueMain(void (*f)(void *data), void *data)
 
 - (void)doTimer:(NSTimer *)timer
 {
-        if (!self->f(self->data))
+        if (!(*(self->f))(self->data))
                 [timer invalidate];
 }
 
@@ -276,7 +276,7 @@ void uiTimer(int milliseconds, int (*f)(void *data), void *data)
         uiprivTimerDelegate *delegate;
 
         delegate = [[uiprivTimerDelegate alloc] initWithCallback:f data:data];
-        [NSTimer scheduledTimerWithTimeInterval:milliseconds / 1000.0
+        [NSTimer scheduledTimerWithTimeInterval:(milliseconds / 1000.0)
                 target:delegate
                 selector:@selector(doTimer:)
                 userInfo:nil
diff --git a/unix/main.c b/unix/main.c
index 338cf716..650fe06f 100644
--- a/unix/main.c
+++ b/unix/main.c
@@ -112,24 +112,23 @@ struct timer {
         void *data;
 };
 
-static gboolean dotimer(gpointer data)
+static gboolean doTimer(gpointer data)
 {
         struct timer *t = (struct timer *) data;
 
-        if((*(t->f))(t->data))
-                return TRUE;
-        else {
-                uiFree(t);
+        if (!(*(t->f))(t->data)) {
+                uiprivFree(t);
                 return FALSE;
         }
+	return TRUE;
 }
 
 void uiTimer(int milliseconds, int (*f)(void *data), void *data)
 {
         struct timer *t;
 
-        t = uiNew(struct timer);
+        t = uiprivNew(struct timer);
         t->f = f;
         t->data = data;
-        g_timeout_add(milliseconds, dotimer, t);
+        g_timeout_add(milliseconds, doTimer, t);
 }
diff --git a/windows/main.cpp b/windows/main.cpp
index 65e49dbb..100c1873 100644
--- a/windows/main.cpp
+++ b/windows/main.cpp
@@ -131,9 +131,11 @@ void uiQueueMain(void (*f)(void *data), void *data)
 
 void uiTimer(int milliseconds, int (*f)(void *data), void *data)
 {
-	UINT_PTR timer;
-	
-	timer = (UINT_PTR) new TimerHandler(f, data);
-	if (SetTimer(utilWindow, timer, milliseconds, NULL) == 0)
-		logLastError(L"SetTimer()");
+	uiprivTimer *timer;
+
+	timer = uiprivNew(uiprivTimer);
+	timer->f = f;
+	timer->data = data;
+	if (SetTimer(utilWindow, (UINT_PTR) timer, milliseconds, NULL) == 0)
+		logLastError(L"error calling SetTimer() in uiTimer()");
 }
diff --git a/windows/uipriv_windows.hpp b/windows/uipriv_windows.hpp
index e77cf439..64a7e8b7 100644
--- a/windows/uipriv_windows.hpp
+++ b/windows/uipriv_windows.hpp
@@ -95,20 +95,9 @@ extern const char *initUtilWindow(HICON hDefaultIcon, HCURSOR hDefaultCursor);
 extern void uninitUtilWindow(void);
 
 // main.cpp
-struct TimerHandler {
-public:
-	TimerHandler() : TimerHandler(NULL, NULL) {}
-	TimerHandler(int(*f)(void *data), void *data)
-	{
-		this->f = f;
-		this->data = data;
-	}
-	int operator()()
-	{
-		return this->f(this->data);
-	}
-private:
-	int(*f)(void *data);
+typedef struct uiprivTimer;
+struct uiprivTimer {
+	void (*f)(void *);
 	void *data;
 };
 extern int registerMessageFilter(void);
diff --git a/windows/utilwin.cpp b/windows/utilwin.cpp
index fce3af09..fc2d15d4 100644
--- a/windows/utilwin.cpp
+++ b/windows/utilwin.cpp
@@ -18,7 +18,7 @@ static LRESULT CALLBACK utilWindowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, L
 {
 	void (*qf)(void *);
 	LRESULT lResult;
-	TimerHandler *timer;
+	uiprivTimer *timer;
 
 	if (handleParentMessages(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
 		return lResult;
@@ -38,11 +38,11 @@ static LRESULT CALLBACK utilWindowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, L
 		(*qf)((void *) lParam);
 		return 0;
 	case WM_TIMER:
-		timer = (TimerHandler *) wParam;
-		if (!(*timer)()) {
-			if (!KillTimer(utilWindow, (UINT_PTR) timer))
-				logLastError(L"KillTimer()");
-			delete timer;
+		timer = (uiprivTimer *) wParam;
+		if (!(*(timer->f))(timer->data)) {
+			if (KillTimer(utilWindow, (UINT_PTR) timer) == 0)
+				logLastError(L"error calling KillTimer() to end uiTimer() procedure");
+			uiprivFree(timer);
 		}
 		return 0;
 	}