diff --git a/specs/fmod_version.txt b/specs/fmod_version.txt
index a65aec9184..c285c50b98 100644
--- a/specs/fmod_version.txt
+++ b/specs/fmod_version.txt
@@ -1 +1,3 @@
 This version of ZDoom must be compiled with any version between 4.22 and 4.28 inclusive.
+Use of the latest 4.26 is recommended though due to technical issues with 4.28.
+