diff --git a/src/ch00-00-introduction.md b/src/ch00-00-introduction.md
index c3d7c4a6e5..985e52e912 100644
--- a/src/ch00-00-introduction.md
+++ b/src/ch00-00-introduction.md
@@ -175,10 +175,10 @@ error. Ferris will also help you distinguish code that isn’t meant to work:
 
 | Ferris                                                                 | Meaning                                          |
 |------------------------------------------------------------------------|--------------------------------------------------|
-| <img src="img/ferris/does_not_compile.svg" class="ferris-explain"/>    | This code does not compile!                      |
-| <img src="img/ferris/panics.svg" class="ferris-explain"/>              | This code panics!                                |
-| <img src="img/ferris/unsafe.svg" class="ferris-explain"/>              | This code block contains unsafe code.            |
-| <img src="img/ferris/not_desired_behavior.svg" class="ferris-explain"/>| This code does not produce the desired behavior. |
+| <img src="img/ferris/does_not_compile.svg" class="ferris-explain" alt="does not compile"/>        | This code does not compile!                      |
+| <img src="img/ferris/panics.svg" class="ferris-explain" alt="panic"/>                             | This code panics!                                |
+| <img src="img/ferris/unsafe.svg" class="ferris-explain" alt="unsafe"/>                            | This code block contains unsafe code.            |
+| <img src="img/ferris/not_desired_behavior.svg" class="ferris-explain" alt="not desired behavior"/>| This code does not produce the desired behavior. |
 
 In most situations, we’ll lead you to the correct version of any code that
 doesn’t compile.