--- a/gui/oprof_start_util.cpp
+++ b/gui/oprof_start_util.cpp
@@ -96,13 +96,6 @@
 	nr_interrupts = 0;
 
 	switch (op_get_interface()) {
-	case OP_INTERFACE_24:
-		{
-			ifstream ifs3("/proc/sys/dev/oprofile/nr_interrupts");
-			if (ifs3)
-				ifs3 >> nr_interrupts;
-		}
-		break;
 	case OP_INTERFACE_26:
 		{
 			static unsigned int old_sum_interrupts;