diff --git a/src/os_mswin.c b/src/os_mswin.c
index 6f3e708..869c9a0 100644
--- a/src/os_mswin.c
+++ b/src/os_mswin.c
@@ -1801,7 +1801,7 @@
 	goto fail;
 
     size = sizeof(FILE_NAME_INFO_) + sizeof(WCHAR) * (MAX_PATH - 1);
-    nameinfo = (FILE_NAME_INFO_*)alloc(size + sizeof(WCHAR));
+    nameinfo = alloc(size + sizeof(WCHAR));
     if (nameinfo == NULL)
 	goto fail;
 
@@ -1835,7 +1835,7 @@
 	    GetLastError() != ERROR_MORE_DATA)
 	goto fail;
 
-    volnames = (WCHAR*)alloc(size * sizeof(WCHAR));
+    volnames = ALLOC_MULT(WCHAR, size);
     if (!GetVolumePathNamesForVolumeNameW(buff, volnames, size,
 		&size))
 	goto fail;
@@ -3078,7 +3078,7 @@
     if (ret == OK && printer_dc == NULL)
     {
 	vim_free(lastlf);
-	lastlf = (LOGFONTW *)alloc(sizeof(LOGFONTW));
+	lastlf = ALLOC_ONE(LOGFONTW);
 	if (lastlf != NULL)
 	    mch_memmove(lastlf, lf, sizeof(LOGFONTW));
     }