diff --git a/renderdoc/api/replay/renderdoc_replay.h b/renderdoc/api/replay/renderdoc_replay.h
index 8be3bb377..fa3177bc9 100644
--- a/renderdoc/api/replay/renderdoc_replay.h
+++ b/renderdoc/api/replay/renderdoc_replay.h
@@ -47,10 +47,6 @@ typedef void(RENDERDOC_CC *pRENDERDOC_FreeArrayMem)(void *mem);
 
 extern "C" RENDERDOC_API void *RENDERDOC_CC RENDERDOC_AllocArrayMem(uint64_t sz);
 typedef void *(RENDERDOC_CC *pRENDERDOC_AllocArrayMem)(uint64_t sz);
-
-// similarly these need to be pre-declared for use in rdhalf
-extern "C" RENDERDOC_API float RENDERDOC_CC RENDERDOC_HalfToFloat(uint16_t half);
-extern "C" RENDERDOC_API uint16_t RENDERDOC_CC RENDERDOC_FloatToHalf(float flt);
 #endif
 
 // declare base types and stringise interface
diff --git a/renderdoc/api/replay/shader_types.h b/renderdoc/api/replay/shader_types.h
index 8a9a7f323..f632d6f2a 100644
--- a/renderdoc/api/replay/shader_types.h
+++ b/renderdoc/api/replay/shader_types.h
@@ -109,6 +109,12 @@ struct BindpointIndex
 
 DECLARE_REFLECTION_STRUCT(BindpointIndex);
 
+#if !defined(SWIG)
+// similarly these need to be pre-declared for use in rdhalf
+extern "C" RENDERDOC_API float RENDERDOC_CC RENDERDOC_HalfToFloat(uint16_t half);
+extern "C" RENDERDOC_API uint16_t RENDERDOC_CC RENDERDOC_FloatToHalf(float flt);
+#endif
+
 struct rdhalf
 {
 #if !defined(SWIG)
diff --git a/renderdoc/serialise/serialiser.cpp b/renderdoc/serialise/serialiser.cpp
index 50a9e0e28..3f8e1699b 100644
--- a/renderdoc/serialise/serialiser.cpp
+++ b/renderdoc/serialise/serialiser.cpp
@@ -26,6 +26,7 @@
 #define SERIALISER_IMPL
 
 #include "serialiser.h"
+#include "api/replay/renderdoc_replay.h"
 #include "core/core.h"
 #include "strings/string_utils.h"