diff --git a/scripts/makefile.amiga b/scripts/makefile.amiga
index 02671a97e..ba10650e8 100644
--- a/scripts/makefile.amiga
+++ b/scripts/makefile.amiga
@@ -24,8 +24,6 @@ LDLIBS= libpng.lib libgz.lib LIB:scm.lib LIB:sc.lib Lib:amiga.lib
 LN= slink
 # file deletion command
 RM= delete quiet
-# file copy command?
-CP= copy
 # library (.lib) file creation command
 AR= oml
 # make directory command
@@ -48,7 +46,7 @@ $(AR) libpng.lib r $(OBJS)
 $(OBJS): pngpriv.h png.h pngconf.h pnglibconf.h pnginfo.h pngstruct.h pngdebug.h
 
 pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
-	$(CP) $< $@
+COPY scripts/pnglibconf.h.prebuilt TO pnglibconf.h
 
 pngtest: pngtest.o libpng.lib
 $(LN) <WITH <