diff --git a/src/fcmp/fcmp_rust/CMakeLists.txt b/src/fcmp/fcmp_rust/CMakeLists.txt
index d89d4e3b6..20c205a9a 100644
--- a/src/fcmp/fcmp_rust/CMakeLists.txt
+++ b/src/fcmp/fcmp_rust/CMakeLists.txt
@@ -26,7 +26,9 @@
 # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-if(ARCH_ID MATCHES "(arm64|armv8a|armv8-a)")
+if(ARCH_ID MATCHES "x86-64)")
+  set(RUST_ARCH "x86_64")
+elseif(ARCH_ID MATCHES "(arm64|armv8a|armv8-a)")
   set(RUST_ARCH "aarch64")
 elseif(ARCH_ID MATCHES "armv7-a")
   set(RUST_ARCH "armv7")