diff --git a/emulator/Makefrag-verilator b/emulator/Makefrag-verilator
index 249c7c18..d2d664db 100644
--- a/emulator/Makefrag-verilator
+++ b/emulator/Makefrag-verilator
@@ -55,6 +55,7 @@ VERILATOR_FLAGS := --top-module $(MODEL) \
   +define+PRINTF_COND=\$$c\(\"verbose\",\"\&\&\"\,\"done_reset\"\) \
   +define+STOP_COND=\$$c\(\"done_reset\"\) --assert \
   --output-split 20000 \
+  --output-split-cfuncs 20000 \
 	-Wno-STMTDLY --x-assign unique \
   -I$(base_dir)/vsrc \
   -O3 -CFLAGS "$(CXXFLAGS) -DVERILATOR -DTEST_HARNESS=V$(MODEL) -include $(base_dir)/csrc/verilator.h"