diff --git a/config/companion_libs/gmp.in b/config/companion_libs/gmp.in
index 900d3426..dd818a07 100644
--- a/config/companion_libs/gmp.in
+++ b/config/companion_libs/gmp.in
@@ -9,6 +9,7 @@ choice
 config GMP_V_5_0_1
     bool
     prompt "5.0.1"
+    depends on EXPERIMENTAL
 
 config GMP_V_4_3_2
     bool