diff --git a/pkgs/development/compilers/gcc/common/configure-flags.nix b/pkgs/development/compilers/gcc/common/configure-flags.nix
index 4bdec26fd99..110218ca1f6 100644
--- a/pkgs/development/compilers/gcc/common/configure-flags.nix
+++ b/pkgs/development/compilers/gcc/common/configure-flags.nix
@@ -86,7 +86,6 @@ let
                           else if targetPlatform.isWindows then "mcf"
                           else "single"}"
       "--enable-nls"
-      "--disable-decimal-float" # No final libdecnumber (it may work only in 386)
     ] ++ lib.optionals (targetPlatform.libc == "uclibc" || targetPlatform.libc == "musl") [
       # libsanitizer requires netrom/netrom.h which is not
       # available in uclibc.