diff --git a/.travis.yml b/.travis.yml
index 1c7e80c..d250080 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,7 +4,7 @@ cache:
   cargo: true
 matrix:
   include:
-  - rust: 1.20.0  # Oldest supported
+  - rust: 1.19.0  # Oldest supported (first version with numeric fields in struct patterns)
   - rust: 1.36.0  # Oldest supported with MaybeUninit
   - rust: stable
   - rust: beta
diff --git a/README.md b/README.md
index d51cfd5..49f4da2 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ Add the following dependency to your `Cargo.toml`:
 memoffset = "0.5"
 ```
 
-These versions will compile fine with rustc versions greater or equal to 1.20.
+These versions will compile fine with rustc versions greater or equal to 1.19.
 
 Add the following lines at the top of your `main.rs` or `lib.rs` files.