diff --git a/hw/application_fpga/fw/mta1_mkdf/Makefile b/hw/application_fpga/fw/mta1_mkdf/Makefile
index 29423e4..f07dc01 100644
--- a/hw/application_fpga/fw/mta1_mkdf/Makefile
+++ b/hw/application_fpga/fw/mta1_mkdf/Makefile
@@ -1,4 +1,6 @@
+FMTFILES=main.c lib.h lib.c proto.h proto.c types.h
 .PHONY: fmt
 fmt:
 	# Uses ../.clang-format
-	clang-format --verbose -i main.c lib.h lib.c proto.h proto.c types.h
+	clang-format --dry-run --ferror-limit=0 $(FMTFILES)
+	clang-format --verbose -i $(FMTFILES)
diff --git a/hw/application_fpga/fw/testfw/Makefile b/hw/application_fpga/fw/testfw/Makefile
index 079f82e..df58812 100644
--- a/hw/application_fpga/fw/testfw/Makefile
+++ b/hw/application_fpga/fw/testfw/Makefile
@@ -1,4 +1,6 @@
+FMTFILES=main.c
 .PHONY: fmt
 fmt:
 	# Uses ../.clang-format
-	clang-format --verbose -i main.c
+	clang-format --dry-run --ferror-limit=0 $(FMTFILES)
+	clang-format --verbose -i $(FMTFILES)
diff --git a/hw/application_fpga/tb/application_fpga_verilator.cc b/hw/application_fpga/tb/application_fpga_verilator.cc
index b0f917a..46c50c3 100644
--- a/hw/application_fpga/tb/application_fpga_verilator.cc
+++ b/hw/application_fpga/tb/application_fpga_verilator.cc
@@ -271,6 +271,7 @@ volatile int touch_cyc = 0;
 
 void sighandler(int)
 {
+	printf("touched!\n");
 	touch_cyc = 1000;
 }