diff --git a/vulkano/src/lib.rs b/vulkano/src/lib.rs
index 1982f5c117..61b093d5cb 100644
--- a/vulkano/src/lib.rs
+++ b/vulkano/src/lib.rs
@@ -425,9 +425,9 @@ impl Display for ValidationError {
 
         if !self.requires_one_of.is_empty() {
             if self.problem.is_empty() {
-                write!(f, "{}", self.requires_one_of)?;
+                write!(f, "requires one of: {}", self.requires_one_of)?;
             } else {
-                write!(f, " -- {}", self.requires_one_of)?;
+                write!(f, " -- requires one of: {}", self.requires_one_of)?;
             }
         }