diff --git a/bin/pt-table-sync b/bin/pt-table-sync
index 814a4890..097fad74 100755
--- a/bin/pt-table-sync
+++ b/bin/pt-table-sync
@@ -1873,6 +1873,8 @@ sub quote_val {
    return $val if $val =~ m/^0x[0-9a-fA-F]+$/  # quote hex data
                   && !$args{is_char};          # unless is_char is true
 
+   return $val if $args{is_float};
+
    $val =~ s/(['\\])/\\$1/g;
    return "'$val'";
 }
@@ -3510,10 +3512,15 @@ sub make_UPDATE {
    my $types = $self->{tbl_struct}->{type_for};
    return "UPDATE $self->{dst_db_tbl} SET "
       . join(', ', map {
-            my $is_char = ($types->{$_} || '') =~ m/char|text/i;
+            my $is_char  = ($types->{$_} || '') =~ m/char|text/i;
+            my $is_float = ($types->{$_} || '') =~ m/float|double/i;
             $self->{Quoter}->quote($_)
-            . '=' .  $self->{Quoter}->quote_val($row->{$_},
-                                              is_char => $is_char);
+            . '='
+            .  $self->{Quoter}->quote_val(
+                  $row->{$_},
+                  is_char  => $is_char,
+                  is_float => $is_float,
+            );
          } grep { !$in_where{$_} } @cols)
       . " WHERE $where LIMIT 1";
 }
@@ -3552,10 +3559,16 @@ sub make_row {
    return "$verb INTO $self->{dst_db_tbl}("
       . join(', ', map { $q->quote($_) } @cols)
       . ') VALUES ('
-      . join(', ', map {
-               my $is_char = ($type_for->{$_} || '') =~ m/char|text/i;
-               $q->quote_val($row->{$_},
-                           is_char => $is_char) } @cols )
+      . join(', ',
+            map {
+               my $is_char  = ($type_for->{$_} || '') =~ m/char|text/i;
+               my $is_float = ($type_for->{$_} || '') =~ m/float|double/i;
+               $q->quote_val(
+                     $row->{$_},
+                     is_char  => $is_char,
+                     is_float => $is_float,
+               )
+            } @cols)
       . ')';
 }
 
@@ -3564,9 +3577,11 @@ sub make_where_clause {
    my @clauses = map {
       my $val = $row->{$_};
       my $sep = defined $val ? '=' : ' IS ';
-      my $is_char = ($self->{tbl_struct}->{type_for}->{$_} || '') =~ m/char|text/i;
+      my $is_char  = ($self->{tbl_struct}->{type_for}->{$_} || '') =~ m/char|text/i;
+      my $is_float = ($self->{tbl_struct}->{type_for}->{$_} || '') =~ m/float|double/i;
       $self->{Quoter}->quote($_) . $sep . $self->{Quoter}->quote_val($val,
-                                              is_char => $is_char);
+                                              is_char  => $is_char,
+                                              is_float => $is_float);
    } @$cols;
    return join(' AND ', @clauses);
 }
diff --git a/lib/ChangeHandler.pm b/lib/ChangeHandler.pm
index c8ac3977..26a24fa0 100644
--- a/lib/ChangeHandler.pm
+++ b/lib/ChangeHandler.pm
@@ -326,10 +326,15 @@ sub make_UPDATE {
    my $types = $self->{tbl_struct}->{type_for};
    return "UPDATE $self->{dst_db_tbl} SET "
       . join(', ', map {
-            my $is_char = ($types->{$_} || '') =~ m/char|text/i;
+            my $is_char  = ($types->{$_} || '') =~ m/char|text/i;
+            my $is_float = ($types->{$_} || '') =~ m/float|double/i;
             $self->{Quoter}->quote($_)
-            . '=' .  $self->{Quoter}->quote_val($row->{$_},
-                                              is_char => $is_char);
+            . '='
+            .  $self->{Quoter}->quote_val(
+                  $row->{$_},
+                  is_char  => $is_char,
+                  is_float => $is_float,
+            );
          } grep { !$in_where{$_} } @cols)
       . " WHERE $where LIMIT 1";
 }
@@ -399,10 +404,16 @@ sub make_row {
    return "$verb INTO $self->{dst_db_tbl}("
       . join(', ', map { $q->quote($_) } @cols)
       . ') VALUES ('
-      . join(', ', map {
-               my $is_char = ($type_for->{$_} || '') =~ m/char|text/i;
-               $q->quote_val($row->{$_},
-                           is_char => $is_char) } @cols )
+      . join(', ',
+            map {
+               my $is_char  = ($type_for->{$_} || '') =~ m/char|text/i;
+               my $is_float = ($type_for->{$_} || '') =~ m/float|double/i;
+               $q->quote_val(
+                     $row->{$_},
+                     is_char  => $is_char,
+                     is_float => $is_float,
+               )
+            } @cols)
       . ')';
 }
 
@@ -420,9 +431,11 @@ sub make_where_clause {
    my @clauses = map {
       my $val = $row->{$_};
       my $sep = defined $val ? '=' : ' IS ';
-      my $is_char = ($self->{tbl_struct}->{type_for}->{$_} || '') =~ m/char|text/i;
+      my $is_char  = ($self->{tbl_struct}->{type_for}->{$_} || '') =~ m/char|text/i;
+      my $is_float = ($self->{tbl_struct}->{type_for}->{$_} || '') =~ m/float|double/i;
       $self->{Quoter}->quote($_) . $sep . $self->{Quoter}->quote_val($val,
-                                              is_char => $is_char);
+                                              is_char  => $is_char,
+                                              is_float => $is_float);
    } @$cols;
    return join(' AND ', @clauses);
 }
diff --git a/lib/Quoter.pm b/lib/Quoter.pm
index 091c4d4b..35edf120 100644
--- a/lib/Quoter.pm
+++ b/lib/Quoter.pm
@@ -77,6 +77,9 @@ sub quote_val {
    return $val if $val =~ m/^0x[0-9a-fA-F]+$/  # quote hex data
                   && !$args{is_char};          # unless is_char is true
 
+   # https://bugs.launchpad.net/percona-toolkit/+bug/1229861
+   return $val if $args{is_float};
+
    # Quote and return non-numeric vals.
    $val =~ s/(['\\])/\\$1/g;
    return "'$val'";
diff --git a/t/pt-table-sync/float_precision.t b/t/pt-table-sync/float_precision.t
index c3e827d8..e49a3e01 100644
--- a/t/pt-table-sync/float_precision.t
+++ b/t/pt-table-sync/float_precision.t
@@ -48,7 +48,7 @@ $output = `$trunk/bin/pt-table-sync --sync-to-master h=127.1,P=12346,u=msandbox,
 $output = remove_traces($output);
 is(
    $output,
-   "REPLACE INTO `test`.`fl`(`id`, `f`, `d`) VALUES ('1', '1.0000011921', '2.0000012');
+   "REPLACE INTO `test`.`fl`(`id`, `f`, `d`) VALUES ('1', 1.0000011921, 2.0000012);
 ",
    'No --float-precision so double col diff at high precision (issue 410)'
 );