diff --git a/src/lib-sieve/plugins/regex/mcht-regex.c b/src/lib-sieve/plugins/regex/mcht-regex.c
index 7a6b28df0b8693fbd7b82bdc4c509568f6883b37..dd98841c9ae721752ebe5b3c8c52fd6c10b601bd 100644
--- a/src/lib-sieve/plugins/regex/mcht-regex.c
+++ b/src/lib-sieve/plugins/regex/mcht-regex.c
@@ -368,9 +368,11 @@ void mcht_regex_match_deinit
 	unsigned int count, i;
 
 	/* Clean up compiled regular expressions */
-	rkeys = array_get_modifiable(&ctx->reg_expressions, &count);
-	for ( i = 0; i < count; i++ ) {
-		regfree(&rkeys[i].regexp);
+	if ( array_is_created(&ctx->reg_expressions) ) {
+		rkeys = array_get_modifiable(&ctx->reg_expressions, &count);
+		for ( i = 0; i < count; i++ ) {
+			regfree(&rkeys[i].regexp);
+		}
 	}
 }