diff --git a/build-aux/syntax-check.mk b/build-aux/syntax-check.mk
index 4ad2a53779..a049c47ea7 100644
--- a/build-aux/syntax-check.mk
+++ b/build-aux/syntax-check.mk
@@ -1390,7 +1390,8 @@ sc_prohibit_inline_functions:
 # glib's G_REGEX_OPTIMIZE instructs the PCRE library to use JIT optimization
 # of the regexes, which requires executable memory to work. Security mechanisms
 # such as SELinux may disallow it. glib gracefully falls back to un-optimized
-# code. This check serves as a warning to not rely on G_REGEX_OPTIMIZE:
+# code. This check serves as a warning to not rely on G_REGEX_OPTIMIZE.
+# Currently we avoid use of G_REGEX_OPTIMIZE anywhere.
 sc_G_REGEX_OPTIMIZE:
 	@prohibit='G_REGEX_OPTIMIZE' \
 	exclude='see sc_G_REGEX_OPTIMIZE' \
diff --git a/src/conf/domain_event.c b/src/conf/domain_event.c
index 434401a5ef..1d9796a1aa 100644
--- a/src/conf/domain_event.c
+++ b/src/conf/domain_event.c
@@ -2643,7 +2643,7 @@ virDomainQemuMonitorEventStateRegisterID(virConnectPtr conn,
     data->flags = flags;
     if (event && flags != -1) {
         if (flags & VIR_CONNECT_DOMAIN_QEMU_MONITOR_EVENT_REGISTER_REGEX) {
-            int cflags = G_REGEX_OPTIMIZE; /* see sc_G_REGEX_OPTIMIZE */
+            int cflags = 0;
             g_autoptr(GError) err = NULL;
 
             if (flags & VIR_CONNECT_DOMAIN_QEMU_MONITOR_EVENT_REGISTER_NOCASE)
diff --git a/src/util/vircommand.c b/src/util/vircommand.c
index 84d4d9c218..984481c613 100644
--- a/src/util/vircommand.c
+++ b/src/util/vircommand.c
@@ -3270,7 +3270,7 @@ virCommandRunRegex(virCommand *cmd,
 
     for (i = 0; i < nregex; i++) {
         g_autoptr(GError) err = NULL;
-        reg[i] = g_regex_new(regex[i], G_REGEX_OPTIMIZE, 0, &err); /* see sc_G_REGEX_OPTIMIZE */
+        reg[i] = g_regex_new(regex[i], 0, 0, &err);
         if (!reg[i]) {
             virReportError(VIR_ERR_INTERNAL_ERROR,
                            _("Failed to compile regex %1$s"), err->message);
diff --git a/src/util/virlog.c b/src/util/virlog.c
index 8a6cb939bc..7e767e8424 100644
--- a/src/util/virlog.c
+++ b/src/util/virlog.c
@@ -253,7 +253,7 @@ virLogOnceInit(void)
     virLogLock();
     virLogDefaultPriority = VIR_LOG_DEFAULT;
 
-    virLogRegex = g_regex_new(VIR_LOG_REGEX, G_REGEX_OPTIMIZE, 0, NULL); /* see sc_G_REGEX_OPTIMIZE */
+    virLogRegex = g_regex_new(VIR_LOG_REGEX, 0, 0, NULL);
 
     /* GLib caches the hostname using a one time thread initializer.
      * We want to prime this cache early though, because at later time