diff --git a/src/util/util.c b/src/util/util.c
index d90091d000..595c430467 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -162,6 +162,10 @@ int bitscanforward(int source)
 		int success = __builtin_ffs(source);
 		return success - 1;
 	#else
+	#pragma message "Falling back to iterative bitscan forward, consider using intrinsics"
+	// This is a low-hanging optimisation boost, check if your compiler offers
+	// any intrinsic.
+	// cf. https://github.com/OpenRCT2/OpenRCT2/pull/2093
 	for (i = 0; i < 32; i++)
 		if (source & (1u << i))
 			return i;