diff --git a/include/evm.h b/include/evm.h
index 454843c..1887123 100644
--- a/include/evm.h
+++ b/include/evm.h
@@ -61,13 +61,13 @@ struct evm_hash256 {
 
 /// The outcome of an execution.
 enum evm_result_outcome {
-    EVM_SUCCESS = 0,
-    EVM_OUT_OF_GAS = 1,
-    EVM_BAD_INSTRUCTION = 2,
-    EVM_BAD_JUMP_DESTINATION = 3,
-    EVM_STACK_OVERFLOW = 4,
-    EVM_STACK_UNDERFLOW = 5,
-    EVM_EXCEPTION = 6
+    EVM_SUCCESS = 1,
+    EVM_OUT_OF_GAS = 2,
+    EVM_BAD_INSTRUCTION = 3,
+    EVM_BAD_JUMP_DESTINATION = 4,
+    EVM_STACK_OVERFLOW = 5,
+    EVM_STACK_UNDERFLOW = 6,
+    EVM_EXCEPTION = 7
 };
 
 /// Complex struct representing execution result.