diff --git a/debian/conf/jellyfin b/debian/conf/jellyfin
index 2f0630a9ce..dc17d40d2f 100644
--- a/debian/conf/jellyfin
+++ b/debian/conf/jellyfin
@@ -27,6 +27,9 @@ JELLYFIN_RESTART_OPT="--restartpath=/usr/lib/jellyfin/restart.sh"
 # ffmpeg binary paths, overriding the system values
 JELLYFIN_FFMPEG_OPT="--ffmpeg=/usr/lib/jellyfin-ffmpeg/ffmpeg"
 
+# Disable glibc dynamic heap adjustment
+MALLOC_TRIM_THRESHOLD_=131072
+
 # [OPTIONAL] run Jellyfin as a headless service
 #JELLYFIN_SERVICE_OPT="--service"
 
diff --git a/fedora/jellyfin.env b/fedora/jellyfin.env
index 89cad1a2d3..9fcded48d4 100644
--- a/fedora/jellyfin.env
+++ b/fedora/jellyfin.env
@@ -26,6 +26,9 @@ JELLYFIN_CACHE_DIR="/var/cache/jellyfin"
 # In-App service control
 JELLYFIN_RESTART_OPT="--restartpath=/usr/libexec/jellyfin/restart.sh"
 
+# Disable glibc dynamic heap adjustment
+MALLOC_TRIM_THRESHOLD_=131072
+
 # [OPTIONAL] ffmpeg binary paths, overriding the UI-configured values
 #JELLYFIN_FFMPEG_OPT="--ffmpeg=/usr/bin/ffmpeg"