diff --git a/compact_str/Cargo.toml b/compact_str/Cargo.toml
index 26506a5a..4005d88a 100644
--- a/compact_str/Cargo.toml
+++ b/compact_str/Cargo.toml
@@ -15,7 +15,7 @@ categories = ["encoding", "parsing", "memory-management", "text-processing"]
 arbitrary = { version = "1", optional = true, default-features = false }
 bytes = { version = "1", optional = true }
 markup = { version = "0.13", optional = true, default-features = false }
-proptest = { version = "1", optional = true, default-features = false }
+proptest = { version = "1", optional = true, default-features = false, features = ["std"] }
 quickcheck = { version = "1", optional = true, default-features = false }
 rkyv = { version = "0.7", optional = true }
 serde = { version = "1", optional = true }