diff --git a/cpu.cpp b/cpu.cpp
index cff25a4..5779d6e 100644
--- a/cpu.cpp
+++ b/cpu.cpp
@@ -501,10 +501,12 @@ bool cpu::additional_double_operand_instructions(const uint16_t instr)
 					int32_t quot = R0R1 / divider;
 					uint16_t rem = R0R1 % divider;
 
+					// TODO: handle results out of range
+
 					setRegister(reg, quot);
 					setRegister(reg + 1, rem);
 
-					setPSW_n(R0R1 / divider < 0);
+					setPSW_n(quot < 0);
 					setPSW_z(quot == 0);
 					setPSW_v(quot > 0xffff || quot < -0xffff);
 					setPSW_c(false);