--- ./ctl_equal.c
+++ ./ctl_equal.c
@@ -263,8 +263,8 @@
 	for(i = 0; i < equal->num_input_controls; i++) {
 		if(equal->control_data->control[i].type == LADSPA_CNTRL_INPUT) {
 			index = equal->control_data->control[i].index;
-			if(equal->klass->PortDescriptors[index] !=
-					(LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL)) {
+			if(equal->klass->PortDescriptors[index] &
+					(LADSPA_PORT_INPUT | LADSPA_PORT_CONTROL) == 0) {
 				SNDERR("Problem with control file %s, %d.", controls, index);
 				return -1;
 			}