diff --git a/openssl-sys/src/ec.rs b/openssl-sys/src/ec.rs
index e0703848..0e9c4680 100644
--- a/openssl-sys/src/ec.rs
+++ b/openssl-sys/src/ec.rs
@@ -61,6 +61,7 @@ extern "C" {
 
     pub fn EC_GROUP_get_degree(group: *const EC_GROUP) -> c_int;
 
+    #[cfg(ossl110)]
     pub fn EC_GROUP_order_bits(group: *const EC_GROUP) -> c_int;
 
     pub fn EC_GROUP_new_curve_GFp(
diff --git a/openssl/src/ec.rs b/openssl/src/ec.rs
index 600974dc..957e50bb 100644
--- a/openssl/src/ec.rs
+++ b/openssl/src/ec.rs
@@ -233,6 +233,7 @@ impl EcGroupRef {
     /// OpenSSL documentation at [`EC_GROUP_order_bits`]
     ///
     /// [`EC_GROUP_order_bits`]: https://www.openssl.org/docs/man1.1.0/crypto/EC_GROUP_order_bits.html
+    #[cfg(ossl110)]
     pub fn order_bits(&self) -> u32 {
         unsafe { ffi::EC_GROUP_order_bits(self.as_ptr()) as u32 }
     }