Republicans, at least for now, appear unlikely to allow federal funds for research on gun violence after a nearly 22-year prohibition.

Following yet another mass shooting on Wednesday, at a Parkland, Florida, high school that left 17 dead, two key Republican appropriators said Thursday they don’t anticipate removing or altering an amendment in the Labor-HHS-Education appropriations bill that bars the Centers for Disease Control and Prevention from using injury prevention research dollars “to advocate or promote gun control.”

“I would not imagine that that would change,” said Senate Labor-HHS-Education Appropriations Chairman Roy Blunt, who is working on his subcommittee’s portion of the fiscal 2018 omnibus measure due March 23. That is when the latest stopgap spending bill runs out, which will be nearly halfway through the current fiscal year.

The so-called Dickey amendment, named for the late Arkansas Republican Rep. Jay Dickey, was first added to the fiscal 1997 omnibus spending bill after CDC research into the connection between keeping guns in the home and the risk of suicide or homicide came to light. The CDC has interpreted the provision as preventing it from studying guns and gun violence.

Watch: Pelosi and Ryan Address Wednesday’s Gun Violence at Weekly Pressers