diff --git a/regression/verilog/preprocessor/in_subdir.desc b/regression/verilog/preprocessor/in_subdir.desc
new file mode 100644
index 000000000..79c0404fb
--- /dev/null
+++ b/regression/verilog/preprocessor/in_subdir.desc
@@ -0,0 +1,7 @@
+KNOWNBUG
+subdir/in_subdir.v
+--preprocess
+^EXIT=0$
+^SIGNAL=0$
+--
+include file in subdirectory not found
diff --git a/regression/verilog/preprocessor/subdir/in_subdir.v b/regression/verilog/preprocessor/subdir/in_subdir.v
new file mode 100644
index 000000000..4168cc1fc
--- /dev/null
+++ b/regression/verilog/preprocessor/subdir/in_subdir.v
@@ -0,0 +1 @@
+`include "include_file.vh"