diff --git a/clippy_lints/src/transmute.rs b/clippy_lints/src/transmute.rs
index 0d68789e0be8..074e4bffec13 100644
--- a/clippy_lints/src/transmute.rs
+++ b/clippy_lints/src/transmute.rs
@@ -122,7 +122,13 @@ impl LateLintPass for Transmute {
 
 
                                     let sugg = if from_pty.ty == to_rty.ty {
-                                        format!("{}{}", deref, arg)
+                                        // Put things in parentheses if they are more complex
+                                        match args[0].node {
+                                            ExprPath(..) | ExprCall(..) | ExprMethodCall(..) | ExprBlock(..) => {
+                                                format!("{}{}", deref, arg)
+                                            }
+                                            _ => format!("{}({})", deref, arg)
+                                        }
                                     } else {
                                         format!("{}({} as {} {})", deref, arg, cast, to_rty.ty)
                                     };
diff --git a/tests/compile-fail/transmute.rs b/tests/compile-fail/transmute.rs
index 4cd19f9bec9c..a0f7ba0ccdea 100644
--- a/tests/compile-fail/transmute.rs
+++ b/tests/compile-fail/transmute.rs
@@ -58,6 +58,11 @@ unsafe fn _ptr_to_ref<T, U>(p: *const T, m: *mut T, o: *const U, om: *mut U) {
     //~| SUGGESTION = &*m;
     let _: &T = &*m;
 
+    let _: &mut T = std::mem::transmute(p as *mut T);
+    //~^ ERROR transmute from a pointer type (`*mut T`) to a reference type (`&mut T`)
+    //~| HELP try
+    //~| SUGGESTION = &mut *(p as *mut T);
+
     let _: &T = std::mem::transmute(o);
     //~^ ERROR transmute from a pointer type (`*const U`) to a reference type (`&T`)
     //~| HELP try