diff --git a/frontends/verilog/verilog_frontend.cc b/frontends/verilog/verilog_frontend.cc
index 723f2d589..737481743 100644
--- a/frontends/verilog/verilog_frontend.cc
+++ b/frontends/verilog/verilog_frontend.cc
@@ -26,7 +26,9 @@
  *
  */
 
+#if !defined(__wasm)
 #include <filesystem>
+#endif
 
 #include "verilog_frontend.h"
 #include "preproc.h"
@@ -674,6 +676,8 @@ struct VerilogDefines : public Pass {
 	}
 } VerilogDefines;
 
+#if !defined(__wasm)
+
 static void parse_file_list(const std::string &file_list_path, RTLIL::Design *design, bool relative_to_file_list_path)
 {
 	std::ifstream flist(file_list_path);
@@ -721,12 +725,10 @@ struct VerilogFileList : public Pass {
 		log("Parse a Verilog file list, and pass the list of Verilog files to read_verilog command.\n");
 		log("\n");
 		log("    -F file_list_path\n");
-		log("        File list file contains list of Verilog files to be parsed, any\n");
-		log("          path is treated relative to the file list file\n");
+		log("        File list file contains list of Verilog files to be parsed, any path is treated relative to the file list file\n");
 		log("\n");
 		log("    -f file_list_path\n");
-		log("        File list file contains list of Verilog files to be parsed, any\n");
-		log("          path is treated relative to current working directroy\n");
+		log("        File list file contains list of Verilog files to be parsed, any path is treated relative to current working directroy\n");
 		log("\n");
 	}
 
@@ -752,6 +754,8 @@ struct VerilogFileList : public Pass {
 	}
 } VerilogFilelist;
 
+#endif
+
 YOSYS_NAMESPACE_END
 
 // the yyerror function used by bison to report parser errors