diff --git a/buildroot-external/board/raspberrypi/config.txt b/buildroot-external/board/raspberrypi/config.txt
index 440bd6732..97d915bdb 100644
--- a/buildroot-external/board/raspberrypi/config.txt
+++ b/buildroot-external/board/raspberrypi/config.txt
@@ -71,6 +71,10 @@ kernel=u-boot.bin
 # Enable audio (loads snd_bcm2835)
 dtparam=audio=on
 
+[pi3]
+# Added to fix #3965
+initial_turbo=0
+
 [pi4]
 # Enable DRM VC4 V3D driver on top of the dispmanx display stack
 dtoverlay=vc4-fkms-v3d
diff --git a/buildroot-external/ota/rauc-hook b/buildroot-external/ota/rauc-hook
index 661c75750..f5417a9a7 100755
--- a/buildroot-external/ota/rauc-hook
+++ b/buildroot-external/ota/rauc-hook
@@ -53,6 +53,21 @@ install_boot() {
         fi
     fi
 
+    # Fix for Pi3 not booting from some SD cards with now default initial_turbo=60
+    # see: https://github.com/home-assistant/operating-system/issues/3965
+    if [ "$RAUC_SYSTEM_COMPATIBLE" = "haos-rpi3" ] || [ "$RAUC_SYSTEM_COMPATIBLE" = "haos-rpi3-64" ]; then
+        # Don't change anything if initial_turbo is already set anywhere
+        if ! grep -q "^initial_turbo=" "${BOOT_MNT}/config.txt"; then
+            if grep -q '^\[pi3\]' "${BOOT_MNT}/config.txt"; then
+                echo "Adding initial_turbo=0 to [pi3] section of config.txt"
+                sed -i '/^\[pi3\]/a # Added to fix #3965\ninitial_turbo=0' "${BOOT_MNT}/config.txt"
+            else
+                echo "Adding [pi3] section with initial_turbo=0 to config.txt"
+                sed -i 's/^\[all\]/\[pi3\]\n# Added to fix #3965\ninitial_turbo=0\n\n\[all\]/' "${BOOT_MNT}/config.txt"
+            fi
+        fi
+    fi
+
     # Prepare rauc.db for migration, should be removed in HAOS 16
     # (along with raucdb-migrate.service and related raucdb-update changes)
     if [ -f /mnt/data/rauc.db ]; then