diff --git a/src/libxl/xen_xl.c b/src/libxl/xen_xl.c
index 7604e3d534..94268fb76d 100644
--- a/src/libxl/xen_xl.c
+++ b/src/libxl/xen_xl.c
@@ -30,6 +30,7 @@
 #include "viralloc.h"
 #include "virstring.h"
 #include "storage_source.h"
+#include "storage_source_backingstore.h"
 #include "xen_xl.h"
 #include "libxl_capabilities.h"
 #include "libxl_conf.h"
diff --git a/src/storage_file/storage_source.h b/src/storage_file/storage_source.h
index 5aaf4c356a..0ae06f4e7d 100644
--- a/src/storage_file/storage_source.h
+++ b/src/storage_file/storage_source.h
@@ -66,11 +66,6 @@ int
 virStorageSourceNewFromBacking(virStorageSource *parent,
                                virStorageSource **backing);
 
-int
-virStorageSourceParseRBDColonString(const char *rbdstr,
-                                    virStorageSource *src)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
-
 int
 virStorageSourceGetRelativeBackingPath(virStorageSource *top,
                                        virStorageSource *base,
diff --git a/src/storage_file/storage_source_backingstore.h b/src/storage_file/storage_source_backingstore.h
index f5ec8e9154..e7e2a58eb9 100644
--- a/src/storage_file/storage_source_backingstore.h
+++ b/src/storage_file/storage_source_backingstore.h
@@ -29,7 +29,8 @@ virStorageSourceParseBackingURI(virStorageSource *src,
 
 int
 virStorageSourceParseRBDColonString(const char *rbdstr,
-                                    virStorageSource *src);
+                                    virStorageSource *src)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 
 int
 virStorageSourceParseBackingColon(virStorageSource *src,