diff --git a/src/interpreter/interpreter.rs b/src/interpreter/interpreter.rs
index 6da95fc..52d4c3c 100644
--- a/src/interpreter/interpreter.rs
+++ b/src/interpreter/interpreter.rs
@@ -431,7 +431,7 @@ impl Interpreter {
                         Mnemonic::JL(_) => flags.sf != flags.of,
                         Mnemonic::JLE(_) => flags.zf || (flags.sf != flags.of),
                         Mnemonic::JGE(_) => flags.sf == flags.of,
-                        Mnemonic::JG(_) => !flags.zf || (flags.sf == flags.of),
+                        Mnemonic::JG(_) => !flags.zf && (flags.sf == flags.of),
                         Mnemonic::JMP_b(_) | Mnemonic::JMP_v(_) => true,
                         _ => panic!("unreachable"),
                     };