diff --git a/hw/syn/opae/sources_32c.txt b/hw/syn/opae/sources_32c.txt
index e1bf6649..1fc88ecd 100644
--- a/hw/syn/opae/sources_32c.txt
+++ b/hw/syn/opae/sources_32c.txt
@@ -2,6 +2,8 @@
 +define+NUM_CLUSTERS=4
 #+define+L3_ENABLE=1
 
++define+GLOBAL_BLOCK_SIZE=16
+
 +define+SYNTHESIS
 +define+QUARTUS
 #+define+PERF_ENABLE
diff --git a/hw/syn/opae/sources_64c.txt b/hw/syn/opae/sources_64c.txt
index 8cc42e1b..bf267717 100644
--- a/hw/syn/opae/sources_64c.txt
+++ b/hw/syn/opae/sources_64c.txt
@@ -2,6 +2,8 @@
 +define+NUM_CLUSTERS=8
 #+define+L3_ENABLE=1
 
++define+GLOBAL_BLOCK_SIZE=16
+
 +define+SYNTHESIS
 +define+QUARTUS
 #+define+PERF_ENABLE