diff --git a/src/include/ipxe/profile.h b/src/include/ipxe/profile.h
index 5d3b6624..b6d2b19e 100644
--- a/src/include/ipxe/profile.h
+++ b/src/include/ipxe/profile.h
@@ -186,4 +186,18 @@ profile_exclude ( struct profiler *profiler ) {
 		profile_excluded += profile_elapsed ( profiler );
 }
 
+/**
+ * Record profiling sample in custom units
+ *
+ * @v profiler		Profiler
+ * @v sample		Profiling sample
+ */
+static inline __attribute__ (( always_inline )) void
+profile_custom ( struct profiler *profiler, unsigned long sample ) {
+
+	/* If profiling is active then update stats */
+	if ( PROFILING )
+		profile_update ( profiler, sample );
+}
+
 #endif /* _IPXE_PROFILE_H */