diff --git a/CHANGELOG.md b/CHANGELOG.md
index e7044146d28..8f4f1d6f6d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## **[Unreleased]**
 
+- [#1252](https://github.com/wasmerio/wasmer/pull/1252) Allow `/` in wasi `--mapdir` wasm path.
 - [#1212](https://github.com/wasmerio/wasmer/pull/1212) Add support for GDB JIT debugging:
   - Add `--generate-debug-info` and `-g` flags to `wasmer run` to generate debug information during compilation. The debug info is passed via the GDB JIT interface to a debugger to allow source-level debugging of Wasm files. Currently only available on clif-backend.
   - Break public middleware APIs: there is now a `source_loc` parameter that should be passed through if applicable.
diff --git a/lib/wasi/src/state/builder.rs b/lib/wasi/src/state/builder.rs
index 10de1901146..94b7e05ee73 100644
--- a/lib/wasi/src/state/builder.rs
+++ b/lib/wasi/src/state/builder.rs
@@ -71,11 +71,6 @@ pub enum WasiStateCreationError {
 fn validate_mapped_dir_alias(alias: &str) -> Result<(), WasiStateCreationError> {
     for byte in alias.bytes() {
         match byte {
-            b'/' => {
-                return Err(WasiStateCreationError::MappedDirAliasFormattingError(
-                    format!("Alias \"{}\" contains the character '/'", alias),
-                ));
-            }
             b'\0' => {
                 return Err(WasiStateCreationError::MappedDirAliasFormattingError(
                     format!("Alias \"{}\" contains a nul byte", alias),