diff --git a/techlibs/common/opensta.cc b/techlibs/common/opensta.cc
index 282481953..655fdbf2d 100644
--- a/techlibs/common/opensta.cc
+++ b/techlibs/common/opensta.cc
@@ -44,6 +44,7 @@ struct OpenstaPass : public Pass
 		bool cleanup = design->scratchpad_get_bool("opensta.cleanup", true);
 
 		log_header(design, "Executing OPENSTA pass.\n");
+		log_experimental("opensta");
 		log_push();
 
 		size_t argidx;
diff --git a/techlibs/common/sdc_expand.cc b/techlibs/common/sdc_expand.cc
index fe8f20aa9..39c50875f 100644
--- a/techlibs/common/sdc_expand.cc
+++ b/techlibs/common/sdc_expand.cc
@@ -37,6 +37,7 @@ struct SdcExpandPass : public ScriptPass
 	void execute(std::vector<std::string> args, RTLIL::Design *design) override
 	{
 		log_header(design, "Executing SDC_EXPAND pass.\n");
+		log_experimental("sdc_expand");
 		string run_from, run_to;
 		opensta_exe = "";
 		cleanup = design->scratchpad_get_bool("sdc_expand.cleanup", true);