diff --git a/ethosu/vela/driver_actions.py b/ethosu/vela/driver_actions.py
index 79ac11a..29c2b18 100644
--- a/ethosu/vela/driver_actions.py
+++ b/ethosu/vela/driver_actions.py
@@ -65,9 +65,9 @@
 
 
 def build_config_word(arch):
-    macs_cc = arch.config.macs
+    macs_cc = arch.ncores * arch.config.macs
     log2_macs_cc = int(np.log2(macs_cc) + 0.5)
-    shram_size = int(arch.shram_size_bytes / 1024)
+    shram_size = arch.ncores * int(arch.shram_size_bytes / 1024)
     n = config_r()
     n.set_shram_size(shram_size)
     n.set_cmd_stream_version(0)  # may be incremented in the future