diff --git a/libgit2-sys/Cargo.toml b/libgit2-sys/Cargo.toml
index 1f5fe34e4d..3a5695328b 100644
--- a/libgit2-sys/Cargo.toml
+++ b/libgit2-sys/Cargo.toml
@@ -22,7 +22,7 @@ path = "lib.rs"
 
 [dependencies]
 libc = "0.2"
-libssh2-sys = { version = "0.2.19", optional = true }
+libssh2-sys = { version = "0.2.19", optional = true, features = ["openssl-on-win32"] }
 libz-sys = { version = "1.1.0", default-features = false, features = ["libc"] }
 
 [build-dependencies]