diff --git a/Makefile b/Makefile
index 28a7849..75c2e36 100644
--- a/Makefile
+++ b/Makefile
@@ -58,7 +58,6 @@ uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
 ifeq ($(uname_S),SunOS)
   REAL_LDFLAGS+= -ldl -lnsl -lsocket
   DYLIB_MAKE_CMD=$(CC) -G -o $(DYLIBNAME) -h $(DYLIB_MINOR_NAME) $(LDFLAGS)
-  INSTALL= cp -r
 endif
 ifeq ($(uname_S),Darwin)
   DYLIBSUFFIX=dylib
@@ -161,11 +160,7 @@ clean:
 dep:
 	$(CC) -MM *.c
 
-ifeq ($(uname_S),$(filter $(uname_S),SunOS OpenBSD))
-  INSTALL?= cp -r
-endif
-
-INSTALL?= cp -a
+INSTALL?= cp -pPR
 
 $(PKGCONFNAME): hiredis.h
 	@echo "Generating $@ for pkgconfig..."