diff --git a/system/system.v b/system/system.v
index c788d0b..e348fc9 100644
--- a/system/system.v
+++ b/system/system.v
@@ -94,7 +94,7 @@ end
 
 
 `ifdef CALCULATE_IPC
-integer instruction_count;
+reg [128:0] instruction_count;
 always @(new_instruction) begin
 	instruction_count<=instruction_count+1;
 end
@@ -153,7 +153,7 @@ always @( ERROR ) begin
 	end
 end
 
-integer cycles;
+reg [128:0] cycles;
 
 always @(negedge clock)begin
 	if(reset==1)