diff --git a/acvm/src/lib.rs b/acvm/src/lib.rs
index 11791df6a..a2dc5d960 100644
--- a/acvm/src/lib.rs
+++ b/acvm/src/lib.rs
@@ -52,6 +52,8 @@ pub enum OpcodeResolutionError {
     UnexpectedOpcode(&'static str, BlackBoxFunc),
     #[error("expected {0} inputs for function {1}, but got {2}")]
     IncorrectNumFunctionArguments(usize, BlackBoxFunc, usize),
+    #[error("failed to solve blackbox function: {0}, reason: {1}")]
+    BlackBoxFunctionFailed(BlackBoxFunc, String),
 }
 
 #[derive(Debug, PartialEq)]