diff --git a/config/cc/gcc.in b/config/cc/gcc.in
index 9e291f48..c3f2fc36 100644
--- a/config/cc/gcc.in
+++ b/config/cc/gcc.in
@@ -356,3 +356,7 @@ config CC_LANG_JAVA_USE_ECJ
     default y
     depends on CC_LANG_JAVA
     depends on CC_GCC_4_3_or_later
+
+# Fortran always requires GMP+MPFR, whatever the gcc version
+config CC_LANG_FORTRAN
+    select CC_GCC_USE_GMP_MPFR