diff --git a/src/pg_tracing.h b/src/pg_tracing.h
index a204f58..df4257c 100644
--- a/src/pg_tracing.h
+++ b/src/pg_tracing.h
@@ -270,7 +270,7 @@ extern void parse_trace_context(pgTracingTraceparent * traceparent, const char *
 extern const char *normalise_query(const char *query, int query_loc, int *query_len_p);
 extern bool text_store_file(pgTracingSharedState * pg_tracing, const char *query,
 							int query_len, Size *query_offset);
-extern const char *qtext_load_file(Size *buffer_size);
+extern char *qtext_load_file(Size *buffer_size);
 
 /* pg_tracing_span.c */
 extern void begin_span(TraceId trace_id, Span * span, SpanType type,
diff --git a/src/pg_tracing_query_process.c b/src/pg_tracing_query_process.c
index 938e5b9..b5193bb 100644
--- a/src/pg_tracing_query_process.c
+++ b/src/pg_tracing_query_process.c
@@ -439,7 +439,7 @@ text_store_file(pgTracingSharedState * pg_tracing, const char *text, int text_le
  *
  * On success, the buffer size is also returned into *buffer_size.
  */
-const char *
+char *
 qtext_load_file(Size *buffer_size)
 {
 	char	   *buf;
diff --git a/src/pg_tracing_sql_functions.c b/src/pg_tracing_sql_functions.c
index e86f9b9..f88b4f9 100644
--- a/src/pg_tracing_sql_functions.c
+++ b/src/pg_tracing_sql_functions.c
@@ -213,7 +213,7 @@ pg_tracing_spans(PG_FUNCTION_ARGS)
 	bool		consume;
 	ReturnSetInfo *rsinfo = (ReturnSetInfo *) fcinfo->resultinfo;
 	Span	   *span;
-	const char *qbuffer;
+	char	   *qbuffer;
 	Size		qbuffer_size = 0;
 	LWLockMode	lock_mode = LW_SHARED;
 
@@ -263,6 +263,7 @@ pg_tracing_spans(PG_FUNCTION_ARGS)
 	pg_tracing_shared_state->stats.last_consume = GetCurrentTimestamp();
 	LWLockRelease(pg_tracing_shared_state->lock);
 
+	free(qbuffer);
 	return (Datum) 0;
 }