diff --git a/sys/windows/Makefile.nmake b/sys/windows/Makefile.nmake
index 6ecb58bec..5da031bec 100644
--- a/sys/windows/Makefile.nmake
+++ b/sys/windows/Makefile.nmake
@@ -1336,19 +1336,19 @@ DLB =
 #
 !IF "$(ADD_CURSES)" == "Y"
 {$(PDCURSES_TOP)}.c{$(OBJPDC)}.o:
-	$(Q)$(CC) /wd4244 $(PDCINCL) $(CFLAGS) $(CURSESDEF2) $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
+	$(Q)$(CC) /wd4244 $(PDCINCL) $(CFLAGS) $(CURSESDEF2) /wd5262 $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
 
 {$(PDCSRC)}.c{$(OBJPDC)}.o:
-	$(Q)$(CC) /wd4244 /wd4267 /wd4774 $(PDCINCL) $(CFLAGS:-w44774= ) $(CURSESDEF2) $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
+	$(Q)$(CC) /wd4244 /wd4267 /wd4774 $(PDCINCL) $(CFLAGS:-w44774= ) $(CURSESDEF2) /wd5262 $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
 
 !IF "$(CURSES_CONSOLE)" == "Y"
 {$(PDCWINCON)}.c{$(OBJPDCC)}.o:
-	$(Q)$(CC) /wd4244 /wd4267 /wd4774 $(PDCINCL) $(PDCINCLCON) $(CFLAGS) $(CURSESDEF2) $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
+	$(Q)$(CC) /wd4244 /wd4267 /wd4774 $(PDCINCL) $(PDCINCLCON) $(CFLAGS) $(CURSESDEF2) /wd5262 $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
 !ENDIF
 
 !IF "$(CURSES_GRAPHICAL)" == "Y"
 {$(PDCWINGUI)}.c{$(OBJPDCG)}.o:
-	$(Q)$(CC) /wd4244 /wd4267 /wd4774 $(PDCINCL) $(PDCINCLGUI) $(CFLAGS) $(CURSESDEF2) $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
+	$(Q)$(CC) /wd4244 /wd4267 /wd4774 $(PDCINCL) $(PDCINCLGUI) $(CFLAGS) $(CURSESDEF2) /wd5262 $(CROSSCOMPILE) $(CROSSCOMPILE_TARGET) -Fo$@ $<
 !ENDIF
 !ENDIF