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-rw-r--r--libguile/gsubr.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libguile/gsubr.h b/libguile/gsubr.h
index 39a3eaaec..963bf4871 100644
--- a/libguile/gsubr.h
+++ b/libguile/gsubr.h
@@ -57,7 +57,7 @@ SCM_INTERNAL uintptr_t scm_i_primitive_call_ip (SCM subr);
union scm_vm_stack_element;
SCM_INTERNAL SCM scm_apply_subr (union scm_vm_stack_element *sp,
- scm_t_ptrdiff nargs);
+ ptrdiff_t nargs);
SCM_API SCM scm_c_make_gsubr (const char *name,
int req, int opt, int rst, scm_t_subr fcn);