diff --git a/include/proto/session.h b/include/proto/session.h
index d54e9454b..0b7d08d99 100644
--- a/include/proto/session.h
+++ b/include/proto/session.h
@@ -62,7 +62,8 @@ static inline void session_store_counters(struct session *sess)
 		if (ptr) {
 			HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
 
-			stktable_data_cast(ptr, conn_cur)--;
+			if (stktable_data_cast(ptr, conn_cur) > 0)
+				stktable_data_cast(ptr, conn_cur)--;
 
 			HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
 
diff --git a/include/proto/stream.h b/include/proto/stream.h
index f44820977..a8c299214 100644
--- a/include/proto/stream.h
+++ b/include/proto/stream.h
@@ -103,7 +103,8 @@ static inline void stream_store_counters(struct stream *s)
 		if (ptr) {
 			HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
 
-			stktable_data_cast(ptr, conn_cur)--;
+			if (stktable_data_cast(ptr, conn_cur) > 0)
+				stktable_data_cast(ptr, conn_cur)--;
 
 			HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);
 
@@ -141,7 +142,8 @@ static inline void stream_stop_content_counters(struct stream *s)
 		if (ptr) {
 			HA_RWLOCK_WRLOCK(STK_SESS_LOCK, &ts->lock);
 
-			stktable_data_cast(ptr, conn_cur)--;
+			if (stktable_data_cast(ptr, conn_cur) > 0)
+				stktable_data_cast(ptr, conn_cur)--;
 
 			HA_RWLOCK_WRUNLOCK(STK_SESS_LOCK, &ts->lock);