diff --git a/src/rvprof_core.c b/src/rvprof_core.c
index 1f05cb5..a4602ae 100644
--- a/src/rvprof_core.c
+++ b/src/rvprof_core.c
@@ -107,7 +107,7 @@ void rvprof_region_begin(const char* name){
     region->child_time = 0;
     region->child_cycles = 0;
     region->func_addr = NULL;
-    region->stack_id = rvprof_stats_get_or_create_stack_id;
+    region->stack_id = rvprof_stats_get_or_create_stack_id();
 
     // look up or create ID for region
     const char* caller;