diff --git a/Instruction-Set.md b/Instruction-Set.md
index 318766a..8d7a0e2 100644
--- a/Instruction-Set.md
+++ b/Instruction-Set.md
@@ -645,7 +645,7 @@ else
     new_sign_bit = 0
 
 if count == 1:
-    OVERFLOW_FLAG = (old_signbit == new_signbit) # check if sign bit changed
+    OVERFLOW_FLAG = (old_signbit != new_signbit) # check if sign bit changed
 
 if new_sign_bit == 1:
     CARRY_FLAG = 1
@@ -718,7 +718,7 @@ else
     new_sign_bit = 0
 
 if count == 1:
-    OVERFLOW_FLAG = (old_signbit == new_signbit) # check if sign bit changed
+    OVERFLOW_FLAG = (old_signbit != new_signbit) # check if sign bit changed
 
 # TODO: less implementation more pseudo code
 if (destination & 0x01) == 1:
@@ -818,7 +818,7 @@ else:
     new_sign_bit = 0
 
 if count == 1:
-    OVERFLOW_FLAG = old_sign_bit == new_sign_bit)
+    OVERFLOW_FLAG = (old_sign_bit != new_sign_bit)
 ```
 
 ### RCR
@@ -863,7 +863,7 @@ else:
     new_sign_bit = 0
 
 if count == 1:
-    OVERFLOW_FLAG = old_sign_bit == new_sign_bit)
+    OVERFLOW_FLAG = (old_sign_bit != new_sign_bit)
 ```
 
 ### NOP