diff -r e49caa693be5 src/events/SDL_keyboard.c
--- a/src/events/SDL_keyboard.c	Mon May 23 15:27:30 2016 -0300
+++ b/src/events/SDL_keyboard.c	Tue May 24 21:55:30 2016 +0300
@@ -354,6 +354,10 @@
 	SDL_KeyRepeat.timestamp = 0;
 }
 
+#ifdef _WIN32
+extern void WIN_ResetDeadKeys(void);
+#endif
+
 int SDL_EnableUNICODE(int enable)
 {
 	int old_mode;
@@ -362,6 +366,11 @@ int SDL_EnableUNICODE(int enable)
 	if ( enable >= 0 ) {
 		SDL_TranslateUNICODE = enable;
 	}
+#ifdef _WIN32
+	if (enable != old_mode) {
+		WIN_ResetDeadKeys();
+	}
+#endif
 	return(old_mode);
 }
 
diff -r e49caa693be5 src/video/windib/SDL_dibevents.c
--- a/src/video/windib/SDL_dibevents.c	Mon May 23 15:27:30 2016 -0300
+++ b/src/video/windib/SDL_dibevents.c	Tue May 24 21:55:30 2016 +0300
@@ -583,6 +583,43 @@
 	return mvke?mvke:vkey;
 }
 
+#ifndef MAPVK_VK_TO_VSC
+#define MAPVK_VK_TO_VSC 0
+#endif
+void
+WIN_ResetDeadKeys(void)
+{
+    /*
+    if a deadkey has been typed, but not the next character (which the deadkey might modify),
+    this tries to undo the effect pressing the deadkey.
+    see: http://archives.miloush.net/michkap/archive/2006/09/10/748775.html
+    */
+
+    BYTE keyboardState[256];
+    WCHAR buffer[16];
+    int keycode, scancode, result, i;
+
+    GetKeyboardState(keyboardState);
+
+    keycode = VK_SPACE;
+    scancode = MapVirtualKey(keycode, MAPVK_VK_TO_VSC);
+    if (scancode == 0)
+    {
+        /* the keyboard doesn't have this key */
+        return;
+    }
+
+    for (i = 0; i < 5; i++)
+    {
+        result = ToUnicode(keycode, scancode, keyboardState, (LPWSTR)buffer, 16, 0);
+        if (result > 0)
+        {
+            /* success */
+            return;
+        }
+    }
+}
+
 static SDL_keysym *TranslateKey(WPARAM vkey, UINT scancode, SDL_keysym *keysym, int pressed)
 {
 	/* Set the keysym information */