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-rw-r--r--libguile/variable.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libguile/variable.h b/libguile/variable.h
index 8faced4ec..20daf853f 100644
--- a/libguile/variable.h
+++ b/libguile/variable.h
@@ -42,6 +42,7 @@ SCM_API SCM scm_make_undefined_variable (void);
SCM_API SCM scm_variable_p (SCM obj);
SCM_API SCM scm_variable_ref (SCM var);
SCM_API SCM scm_variable_set_x (SCM var, SCM val);
+SCM_API SCM scm_variable_unset_x (SCM var);
SCM_API SCM scm_variable_bound_p (SCM var);
SCM_INTERNAL void scm_i_variable_print (SCM var, SCM port, scm_print_state *pstate);