diff --git a/Makefile b/Makefile
index 8845901..376f2e4 100644
--- a/Makefile
+++ b/Makefile
@@ -172,16 +172,16 @@ install: all
 	mkdir -p ${DESTDIR}/usr/include/hfi1diag
 	mkdir -p ${DESTDIR}/usr/include/hfi1diag/linux-x86_64
 	mkdir -p ${DESTDIR}/usr/include/hfi1diag/ptl_ips
-	install -D ptl_ips/ipserror.h ${DESTDIR}/usr/include/hfi1diag/ptl_ips/ipserror.h
-	install -D include/linux-x86_64/bit_ops.h ${DESTDIR}/usr/include/hfi1diag/linux-x86_64/bit_ops.h
-	install -D include/linux-x86_64/sysdep.h ${DESTDIR}/usr/include/hfi1diag/linux-x86_64/sysdep.h
-	install -D include/opa_udebug.h ${DESTDIR}/usr/include/hfi1diag/opa_udebug.h
-	install -D include/opa_debug.h ${DESTDIR}/usr/include/hfi1diag/opa_debug.h
-	install -D include/opa_intf.h ${DESTDIR}/usr/include/hfi1diag/opa_intf.h
-	install -D include/opa_user.h ${DESTDIR}/usr/include/hfi1diag/opa_user.h
-	install -D include/opa_service.h ${DESTDIR}/usr/include/hfi1diag/opa_service.h
-	install -D include/opa_common.h ${DESTDIR}/usr/include/hfi1diag/opa_common.h
-	install -D include/opa_byteorder.h ${DESTDIR}/usr/include/hfi1diag/opa_byteorder.h
+	install -m 0644 -D ptl_ips/ipserror.h ${DESTDIR}/usr/include/hfi1diag/ptl_ips/ipserror.h
+	install -m 0644 -D include/linux-x86_64/bit_ops.h ${DESTDIR}/usr/include/hfi1diag/linux-x86_64/bit_ops.h
+	install -m 0644 -D include/linux-x86_64/sysdep.h ${DESTDIR}/usr/include/hfi1diag/linux-x86_64/sysdep.h
+	install -m 0644 -D include/opa_udebug.h ${DESTDIR}/usr/include/hfi1diag/opa_udebug.h
+	install -m 0644 -D include/opa_debug.h ${DESTDIR}/usr/include/hfi1diag/opa_debug.h
+	install -m 0644 -D include/opa_intf.h ${DESTDIR}/usr/include/hfi1diag/opa_intf.h
+	install -m 0644 -D include/opa_user.h ${DESTDIR}/usr/include/hfi1diag/opa_user.h
+	install -m 0644 -D include/opa_service.h ${DESTDIR}/usr/include/hfi1diag/opa_service.h
+	install -m 0644 -D include/opa_common.h ${DESTDIR}/usr/include/hfi1diag/opa_common.h
+	install -m 0644 -D include/opa_byteorder.h ${DESTDIR}/usr/include/hfi1diag/opa_byteorder.h
 
 specfile:
 	sed -e 's/@VERSION@/'${VERSION}'/g' ${RPM_NAME}.spec.in | \