diff --git a/Cargo.toml b/Cargo.toml
index 6c39191b..7c656ed8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,6 +14,7 @@ edition = "2018"
 
 [dependencies]
 http = "0.1.19"
+percent-encoding = { version = "2.1.0", optional = true }
 ruma-api-macros = { path = "ruma-api-macros", optional = true }
 ruma-identifiers = "0.14.0"
 serde = { version = "1.0.102", features = ["derive"], optional = true }
@@ -23,7 +24,7 @@ url = { version = "2.1.0", optional = true }
 
 [features]
 default = ["with-ruma-api-macros"]
-with-ruma-api-macros = ["ruma-api-macros", "serde", "url"]
+with-ruma-api-macros = ["percent-encoding", "ruma-api-macros", "serde", "url"]
 
 [workspace]
 members = [