Index: win32/win32.c
===================================================================
--- win32/win32.c	(revision 27909)
+++ win32/win32.c	(working copy)
@@ -992,10 +992,13 @@
 {
     BOOL fRet;
     DWORD  dwCreationFlags;
-    STARTUPINFO aStartupInfo;
+    STARTUPINFOW aStartupInfo;
     PROCESS_INFORMATION aProcessInformation;
     SECURITY_ATTRIBUTES sa;
     struct ChildRecord *child;
+    
+    WCHAR* wprog = NULL;
+    WCHAR* wcmd = NULL;
 
     if (!cmd && !prog) {
 	errno = EFAULT;
@@ -1015,9 +1018,17 @@
 	psa = &sa;
     }
 
-    memset(&aStartupInfo, 0, sizeof (STARTUPINFO));
+    if (!(wprog = utf8_to_wstr(prog, NULL)) || !(wcmd = utf8_to_wstr(cmd, NULL)))
+    {
+        free(wcmd);
+        free(wprog);
+        
+    	return NULL;
+    }
+
+    memset(&aStartupInfo, 0, sizeof (STARTUPINFOW));
     memset(&aProcessInformation, 0, sizeof (PROCESS_INFORMATION));
-    aStartupInfo.cb = sizeof (STARTUPINFO);
+    aStartupInfo.cb = sizeof (STARTUPINFOW);
     aStartupInfo.dwFlags = STARTF_USESTDHANDLES;
     if (hInput) {
 	aStartupInfo.hStdInput  = hInput;
@@ -1041,11 +1052,14 @@
     dwCreationFlags = (NORMAL_PRIORITY_CLASS);
 
     RUBY_CRITICAL({
-	fRet = CreateProcess(prog, (char *)cmd, psa, psa,
+	fRet = CreateProcessW(wprog, wcmd, psa, psa,
 			     psa->bInheritHandle, dwCreationFlags, NULL, NULL,
 			     &aStartupInfo, &aProcessInformation);
 	errno = map_errno(GetLastError());
     });
+    
+    free(wcmd);
+    free(wprog);
 
     if (!fRet) {
 	child->pid = 0;		/* release the slot */