diff --git a/renderdoc/replay/replay_driver.cpp b/renderdoc/replay/replay_driver.cpp
index e9736ee23..3c733c507 100644
--- a/renderdoc/replay/replay_driver.cpp
+++ b/renderdoc/replay/replay_driver.cpp
@@ -190,9 +190,10 @@ void PatchLineStripIndexBuffer(const ActionDescription *action, Topology topolog
 {
   const uint32_t restart = 0xffffffff;
 
-#define IDX_VALUE(offs)          \
-  (idx16 ? idx16[index + (offs)] \
-         : (idx32 ? idx32[index + (offs)] : (idx8 ? idx8[index + (offs)] : index + (offs))))
+#define IDX_VALUE(offs)                                                                        \
+  (idx16 ? idx16[index + (offs)]                                                               \
+         : (idx32 ? idx32[index + (offs)] : (idx8 ? idx8[index + (offs)] : index + (offs)))) + \
+      action->baseVertex
 
   switch(topology)
   {