diff --git a/gmp-mparam.h b/gmp-mparam.h
index b22136f..46b71a9 100644
--- a/gmp-mparam.h
+++ b/gmp-mparam.h
@@ -75,6 +75,8 @@ along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
 #include "gmp-mparam-mipsel.h"
 #elif defined(__mips)
 #include "gmp-mparam-mips.h"
+#elif defined(__riscv64)
+#include "gmp-mparam-riscv64.h"
 #else
 #error "The gmp-devel package is not usable with the architecture."
 #endif
diff --git a/gmp.h b/gmp.h
index 9d9f0a8..cddc111 100644
--- a/gmp.h
+++ b/gmp.h
@@ -75,6 +75,8 @@ along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
 #include "gmp-mipsel.h"
 #elif defined(__mips)
 #include "gmp-mips.h"
+#elif defined(__riscv64)
+#include "gmp-riscv64.h"
 #else
 #error "The gmp-devel package is not usable with the architecture."
 #endif