diff --git a/src/epics/util/feCodeGen.pl b/src/epics/util/feCodeGen.pl
index b28710dea1b68f05e352d27f855d48918139b11c..ebe83247c2c7c04325d96aa3c59550adc59cd9c6 100755
--- a/src/epics/util/feCodeGen.pl
+++ b/src/epics/util/feCodeGen.pl
@@ -2541,6 +2541,10 @@ for($ii=0;$ii<$partCnt;$ii++)
 		$port = $partInCnt[$ii];                                   # ===  MA  ===
 		print OUT "double \L$xpartName[$ii];\n";                   # ===  MA  ===
 	}                                                                  # ===  MA  ===
+	if($partType[$ii] eq "M_LOG10") {                                    # ===  MA  ===
+		$port = $partInCnt[$ii];                                   # ===  MA  ===
+		print OUT "double \L$xpartName[$ii];\n";                   # ===  MA  ===
+	}                                                                  # ===  MA  ===
 	if($partType[$ii] eq "DELAY") {
 		print OUT "static double \L$xpartName[$ii] = 0.0;\n";
 	}
@@ -2997,6 +3001,13 @@ HERE
 		print OUT "$calcExp";                                      # ===  MA  ===
 		print OUT "\}\n";                                          # ===  MA  ===
 	}                                                                  # ===  MA  ===
+	if ($partType[$mm] eq "M_LOG10") {                                   # ===  MA  ===
+	   print OUT "// MATH FUNCTION - LOG10\n";                        # ===  MA  ===
+		$calcExp = "\t\L$xpartName[$mm]";                          # ===  MA  ===
+		$calcExp .= " = ";                                         # ===  MA  ===
+		$calcExp .= "llog10\($fromExp[0]\);\n";                     # ===  MA  ===
+		print OUT "$calcExp";                                      # ===  MA  ===
+	}                                                                  # ===  MA  ===
 
 	# ******** GROUND INPUT ********************************************************************
 	if(($partType[$mm] eq "GROUND") && ($partUsed[$mm] == 0))
diff --git a/src/epics/util/lib/Parser3.pm b/src/epics/util/lib/Parser3.pm
index d48aea03b0c2473b639b580181546228e1ea3569..56d366603d318ee53aa15f1c2a6d717d85434c43 100644
--- a/src/epics/util/lib/Parser3.pm
+++ b/src/epics/util/lib/Parser3.pm
@@ -438,6 +438,9 @@ sub node_processing {
            elsif ($math_op eq "mod") {                                     # ===  MA  ===
               $block_type = "M_MOD";                                       # ===  MA  ===
            }                                                               # ===  MA  ===
+           elsif ($math_op eq "log10") {  
+              $block_type = "M_LOG10";  
+           }                                                               # ===  MA  ===
            else {                                                          # ===  MA  ===
               die "*** ERROR: Math operator not supported: $math_op \n";   # ===  MA  ===
            }                                                               # ===  MA  ===