diff --git a/gas/ChangeLog b/gas/ChangeLog
index a5ffe08eb4d..af34ad85ae1 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2020-06-26  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/tc-i386.c (md_assemble): Process ImmExt without
+	operands.
+
 2020-06-26  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/tc-i386.c (check_VecOperands): Replace vecsib with sib.
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index bae96805156..ae2a2c1a536 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -4873,8 +4873,12 @@ md_assemble (char *line)
       if (!process_operands ())
 	return;
     }
-  else if (!quiet_warnings && i.tm.opcode_modifier.ugh)
+  else
     {
+      if (i.tm.opcode_modifier.immext)
+	process_immext ();
+
+      if (!quiet_warnings && i.tm.opcode_modifier.ugh)
       /* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc.  */
       as_warn (_("translating to `%sp'"), i.tm.name);
     }