diff --git a/libtcc.c b/libtcc.c
index 5df1949..a24ef2d 100644
--- a/libtcc.c
+++ b/libtcc.c
@@ -121,7 +121,7 @@ void dlclose(void *p)
 #endif
 
 #ifdef LIBTCC_AS_DLL
-BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
+BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 {
     if (DLL_PROCESS_ATTACH == dwReason)
         tcc_module = hDll;
diff --git a/tcc.c b/tcc.c
index 74a5f1b..392efca 100644
--- a/tcc.c
+++ b/tcc.c
@@ -78,7 +78,7 @@ static void help(void)
 #include <process.h>
 static int execvp_win32(const char *prog, char **argv)
 {
-    int ret = spawnvp(P_NOWAIT, prog, (char *const*)argv);
+    int ret = spawnvp(P_NOWAIT, prog, (const char *const*)argv);
     if (-1 == ret)
         return ret;
     cwait(&ret, ret, WAIT_CHILD);