diff --git a/cpu.cpp b/cpu.cpp
index 574a42d..c1e5a74 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -1344,11 +1344,8 @@ bool cpu::single_operand_instructions(const uint16_t instr)
 
 					 // retrieve word from '15/14'-stack
 					 uint16_t v             = popStack();
-
 					 bool     set_flags     = true;
 
-					 mtpi_count++;
-
 					 if (dst_mode == 0)
 						setRegister(dst_reg, v, rm_prev);
 					 else {
diff --git a/cpu.h b/cpu.h
index 057880f..b547c82 100644
--- a/cpu.h
+++ b/cpu.h
@@ -53,7 +53,6 @@ private:
 	uint64_t running_since      { 0     };
 	uint64_t wait_time          { 0     };
 	bool     it_is_a_trap       { false };
-	uint64_t mtpi_count         { 0     };
 
 	bool     debug_mode         { false };
 	std::vector<std::pair<uint16_t, std::string> > stacktrace;