diff --git a/src/build/libhaikucompat/Jamfile b/src/build/libhaikucompat/Jamfile
index 2423809597..e6b8cac61f 100644
--- a/src/build/libhaikucompat/Jamfile
+++ b/src/build/libhaikucompat/Jamfile
@@ -25,6 +25,10 @@ if $(HOST_PLATFORM) in r5 bone dano {
 		: [ FDirName $(HAIKU_TOP) headers build os support ] ;
 	ObjectSysHdrs $(libbePatchSources)
 		: [ FDirName $(HAIKU_TOP) headers build os storage ] ;
+	if $(HOST_PLATFORM) = r5 {
+		ObjectDefines $(libbePatchSources) :
+			USING_HAIKU_TYPE_CONSTANTS_H= ;
+	}
 	if $(HOST_PLATFORM) = bone {
 		ObjectDefines $(libbePatchSources) :
 			USING_HAIKU_TYPE_CONSTANTS_H= ;