diff --git a/core/core.func b/core/core.func
index f1a3cb3..4f71369 100644
--- a/core/core.func
+++ b/core/core.func
@@ -739,7 +739,11 @@ pmxcfs_check() {
 # ------------------------------------------------------------------------------
 arch_check() {
   local arch
-  arch="$(dpkg --print-architecture)"
+  arch="$(dpkg --print-architecture 2>/dev/null || uname -m)"
+  case "$arch" in
+  x86_64) arch="amd64" ;;
+  aarch64) arch="arm64" ;;
+  esac
   if [[ "$arch" != "amd64" && "$arch" != "arm64" ]]; then
     msg_error "This script requires amd64 or arm64 (detected: $arch)."
     sleep 2
diff --git a/incus/build.func b/incus/build.func
index 2af2749..327293e 100644
--- a/incus/build.func
+++ b/incus/build.func
@@ -307,7 +307,6 @@ pve_check() {
   fi
   incus_check
 }
-arch_check() { :; }
 arm64_notice() { :; }
 ssh_check() { :; }
 
diff --git a/incus/core.func b/incus/core.func
index 35c362b..da0a6d2 100644
--- a/incus/core.func
+++ b/incus/core.func
@@ -283,9 +283,6 @@ incus_check() {
   fi
 }
 
-# Incus handles cross-architecture natively (e.g. x86 host running ARM containers).
-# No arch_check needed - removed from Incus scripts.
-
 # ==============================================================================
 # SECTION 3: EXECUTION HELPERS
 # ==============================================================================