diff --git a/wasmi/Cargo.toml b/wasmi/Cargo.toml
index 9a5455b..1f5b327 100644
--- a/wasmi/Cargo.toml
+++ b/wasmi/Cargo.toml
@@ -15,8 +15,8 @@ default = ["std"]
 # Disable for no_std support
 std = ["parity-wasm/std", "byteorder/std"]
 # Enable for no_std support
-# hashmap_core only works on no_std
-core = ["hashmap_core", "libm"]
+# hashbrown only works on no_std
+core = ["hashbrown", "libm"]
 derive = ["wasmi-derive"]
 
 [dependencies]