diff --git a/pkgs/development/interpreters/guile/default.nix b/pkgs/development/interpreters/guile/default.nix
index 93676a9b11a3..78a7a8e793ee 100644
--- a/pkgs/development/interpreters/guile/default.nix
+++ b/pkgs/development/interpreters/guile/default.nix
@@ -99,10 +99,10 @@
 
 //
 
-(if stdenv.isFreeBSD
+(if (stdenv.isFreeBSD || stdenv.isSunOS)
  then {
-   # XXX: Thread support is currently broken on FreeBSD (namely the
-   # `SCM_I_IS_THREAD' assertion in `scm_spawn_thread' is hit.)
+   # XXX: Thread support is currently broken on FreeBSD and Solaris (namely
+   # the `SCM_I_IS_THREAD' assertion in `scm_spawn_thread' is hit.)
    configureFlags = [ "--without-threads" ];
  }
  else {}))