diff --git a/parser/mount.cc b/parser/mount.cc
index 31f38c825..c7f11f4aa 100644
--- a/parser/mount.cc
+++ b/parser/mount.cc
@@ -570,6 +570,8 @@ ostream &mnt_rule::dump(ostream &os)
 {
 	prefix_rule_t::dump(os);
 
+	std::ios::fmtflags fmt(os.flags());
+
 	if (perms & AA_MAY_MOUNT)
 		os << "mount";
 	else if (perms & AA_MAY_UMOUNT)
@@ -603,6 +605,7 @@ ostream &mnt_rule::dump(ostream &os)
 	os << " " << "(0x" << hex << perms << "/0x" << (audit != AUDIT_UNSPECIFIED ? perms : 0) << ")";
 	os << ",\n";
 
+	os.flags(fmt);
 	return os;
 }
 
diff --git a/parser/rule.h b/parser/rule.h
index 6a0bec8ae..7d86e3d1d 100644
--- a/parser/rule.h
+++ b/parser/rule.h
@@ -431,11 +431,14 @@ public:
 	ostream &dump(ostream &os) override {
 		class_rule_t::dump(os);
 
+		std::ios::fmtflags fmt(os.flags());
+
 		if (saved)
 			os << "(0x" << std::hex << perms << "/orig " << saved << ") ";
 		else
 			os << "(0x" << std::hex << perms << ") ";
 
+		os.flags(fmt);
 		return os;
 	}
 
@@ -460,7 +463,11 @@ public:
 	ostream &dump(ostream &os) override {
 		class_rule_t::dump(os);
 
+		std::ios::fmtflags fmt(os.flags());
+
 		os << "(0x" << std::hex << perms << ") ";
+
+		os.flags(fmt);
 		return os;
 	}