diff --git a/src/util/u_debug_stack.c b/src/util/u_debug_stack.c
index 21f0371d3c1..01f69e14442 100644
--- a/src/util/u_debug_stack.c
+++ b/src/util/u_debug_stack.c
@@ -94,7 +94,7 @@ debug_backtrace_capture(struct debug_stack_frame *backtrace,
    unw_proc_info_t pip;
    unsigned i = 0;
 
-   pip.unwind_info = NULL;
+   pip.unwind_info = 0;
 
    unw_getcontext(&context);
    unw_init_local(&cursor, &context);