diff --git a/server/modules/filter/qlafilter.c b/server/modules/filter/qlafilter.c
index 2167f17e8..8e999c9aa 100644
--- a/server/modules/filter/qlafilter.c
+++ b/server/modules/filter/qlafilter.c
@@ -170,30 +170,33 @@ int		i;
 		my_instance->source = NULL;
 		my_instance->match = NULL;
 		my_instance->nomatch = NULL;
-		for (i = 0; params[i]; i++)
+		if (params)
 		{
-			if (!strcmp(params[i]->name, "match"))
+			for (i = 0; params[i]; i++)
 			{
-				my_instance->match = strdup(params[i]->value);
-			}
-			else if (!strcmp(params[i]->name, "exclude"))
-			{
-				my_instance->nomatch = strdup(params[i]->value);
-			}
-			else if (!strcmp(params[i]->name, "source"))
-				my_instance->source = strdup(params[i]->value);
-			else if (!strcmp(params[i]->name, "filebase"))
-			{
-				if (my_instance->filebase)
-					free(my_instance->filebase);
-				my_instance->source = strdup(params[i]->value);
-			}
-			else if (!filter_standard_parameter(params[i]->name))
-			{
-				LOGIF(LE, (skygw_log_write_flush(
-					LOGFILE_ERROR,
-					"qlafilter: Unexpected parameter '%s'.\n",
-					params[i]->name)));
+				if (!strcmp(params[i]->name, "match"))
+				{
+					my_instance->match = strdup(params[i]->value);
+				}
+				else if (!strcmp(params[i]->name, "exclude"))
+				{
+					my_instance->nomatch = strdup(params[i]->value);
+				}
+				else if (!strcmp(params[i]->name, "source"))
+					my_instance->source = strdup(params[i]->value);
+				else if (!strcmp(params[i]->name, "filebase"))
+				{
+					if (my_instance->filebase)
+						free(my_instance->filebase);
+					my_instance->source = strdup(params[i]->value);
+				}
+				else if (!filter_standard_parameter(params[i]->name))
+				{
+					LOGIF(LE, (skygw_log_write_flush(
+						LOGFILE_ERROR,
+						"qlafilter: Unexpected parameter '%s'.\n",
+						params[i]->name)));
+				}
 			}
 		}
 		my_instance->sessions = 0;
diff --git a/server/modules/filter/regexfilter.c b/server/modules/filter/regexfilter.c
index 0eaf50825..106dd73d8 100644
--- a/server/modules/filter/regexfilter.c
+++ b/server/modules/filter/regexfilter.c
@@ -137,7 +137,7 @@ int		i, cflags = REG_ICASE;
 		my_instance->match = NULL;
 		my_instance->replace = NULL;
 
-		for (i = 0; params[i]; i++)
+		for (i = 0; params && params[i]; i++)
 		{
 			if (!strcmp(params[i]->name, "match"))
 				my_instance->match = strdup(params[i]->value);
@@ -152,22 +152,25 @@ int		i, cflags = REG_ICASE;
 			}
 		}
 
-		for (i = 0; options[i]; i++)
+		if (options)
 		{
-			if (!strcasecmp(options[i], "ignorecase"))
+			for (i = 0; options[i]; i++)
 			{
-				cflags |= REG_ICASE;
-			}
-			else if (!strcasecmp(options[i], "case"))
-			{
-				cflags &= ~REG_ICASE;
-			}
-			else
-			{
-				LOGIF(LE, (skygw_log_write_flush(
-					LOGFILE_ERROR,
-					"regexfilter: unsupported option '%s'.\n",
-					options[i])));
+				if (!strcasecmp(options[i], "ignorecase"))
+				{
+					cflags |= REG_ICASE;
+				}
+				else if (!strcasecmp(options[i], "case"))
+				{
+					cflags &= ~REG_ICASE;
+				}
+				else
+				{
+					LOGIF(LE, (skygw_log_write_flush(
+						LOGFILE_ERROR,
+						"regexfilter: unsupported option '%s'.\n",
+						options[i])));
+				}
 			}
 		}
 
diff --git a/server/modules/filter/topfilter.c b/server/modules/filter/topfilter.c
index 747306125..48102be5e 100644
--- a/server/modules/filter/topfilter.c
+++ b/server/modules/filter/topfilter.c
@@ -183,7 +183,7 @@ TOPN_INSTANCE	*my_instance;
 		my_instance->exclude = NULL;
 		my_instance->source = NULL;
 		my_instance->filebase = strdup("top");
-		for (i = 0; params[i]; i++)
+		for (i = 0; params && params[i]; i++)
 		{
 			if (!strcmp(params[i]->name, "count"))
 				my_instance->topN = atoi(params[i]->value);
@@ -210,6 +210,12 @@ TOPN_INSTANCE	*my_instance;
 					params[i]->name)));
 			}
 		}
+		if (options)
+		{
+			LOGIF(LE, (skygw_log_write_flush(LOGFILE_ERROR,
+				"topfilter: Options are not supported by this "
+				" filter. They will be ignored\n")));
+		}
 		my_instance->sessions = 0;
 		if (my_instance->match &&
 			regcomp(&my_instance->re, my_instance->match, REG_ICASE))