diff --git a/src/dreammaker/error.rs b/src/dreammaker/error.rs
index 9c8e35e2..28bd8586 100644
--- a/src/dreammaker/error.rs
+++ b/src/dreammaker/error.rs
@@ -411,7 +411,7 @@ impl DMError {
         }
     }
 
-    pub fn set_cause<E: error::Error + Send + Sync + 'static>(mut self, cause: E) -> DMError {
+    pub fn with_cause<E: error::Error + Send + Sync + 'static>(mut self, cause: E) -> DMError {
         self.cause = Some(Box::new(cause));
         self
     }
diff --git a/src/dreammaker/lexer.rs b/src/dreammaker/lexer.rs
index 19c10fd0..c28cff52 100644
--- a/src/dreammaker/lexer.rs
+++ b/src/dreammaker/lexer.rs
@@ -535,7 +535,7 @@ impl<I: Iterator<Item=io::Result<u8>>> Iterator for LocationTracker<I> {
                 }
                 Some(Ok(ch))
             }
-            Some(Err(e)) => Some(Err(DMError::new(self.location, "i/o error").set_cause(e))),
+            Some(Err(e)) => Some(Err(DMError::new(self.location, "i/o error").with_cause(e))),
         }
     }
 }
diff --git a/src/dreammaker/parser.rs b/src/dreammaker/parser.rs
index 1c4c6c51..3ac2ebaa 100644
--- a/src/dreammaker/parser.rs
+++ b/src/dreammaker/parser.rs
@@ -474,7 +474,7 @@ impl<'ctx, 'an, 'inp> Parser<'ctx, 'an, 'inp> {
             }
             Err(err) => self
                 .error(format!("i/o error, expected one of: {}", expected))
-                .set_cause(err),
+                .with_cause(err),
         }
     }
 
diff --git a/src/dreammaker/preprocessor.rs b/src/dreammaker/preprocessor.rs
index 83a1ac2c..b51bfddb 100644
--- a/src/dreammaker/preprocessor.rs
+++ b/src/dreammaker/preprocessor.rs
@@ -616,7 +616,7 @@ impl<'ctx> Preprocessor<'ctx> {
         // Attempt to open the file.
         let read = io::BufReader::new(File::open(&path).map_err(|e|
             DMError::new(self.last_input_loc, format!("failed to open file: #include {:?}", path))
-                .set_cause(e))?);
+                .with_cause(e))?);
 
         // Get the path relative to the environment root, for easy lookup later.
         let register = path.strip_prefix(self.env_file.parent().unwrap()).unwrap_or(&path);
diff --git a/src/tools/dmm.rs b/src/tools/dmm.rs
index 508afcd7..18ea6693 100644
--- a/src/tools/dmm.rs
+++ b/src/tools/dmm.rs
@@ -159,7 +159,7 @@ impl Map {
             grid: Array3::default((1, 1, 1)),
         };
         read::parse_map(&mut map, File::open(path).map_err(|e| {
-            DMError::new(Location::default(), "i/o error").set_cause(e)
+            DMError::new(Location::default(), "i/o error").with_cause(e)
         })?)?;
         Ok(map)
     }