diff --git a/char-def.lua b/char-def.lua
index 3aec401..5f768e3 100644
--- a/char-def.lua
+++ b/char-def.lua
@@ -54277,6 +54277,8 @@ characters.data={
   description="NORMAL SUBGROUP OF",
   direction="on",
   linebreak="al",
+  mathspec = {
+    class="bin", mathname="triangleleft",
   mathclass="bin",
   mathname="triangleleft",
   mirror=0x22B3,
@@ -59806,6 +59808,8 @@ characters.data={
   description="BLACK SQUARE",
   direction="on",
   linebreak="ai",
+  mathclass="ord",
+  mathname="blacksquare",
   unicodeslot=0x25A0,
  },
  [0x25A1]={
@@ -68185,7 +68189,7 @@ characters.data={
   direction="on",
   linebreak="al",
   mathclass="relation",
-  mathname="rneq",
+  mathname="gneq",
   unicodeslot=0x2A88,
  },
  [0x2A89]={
diff --git a/math-vfu.lua b/math-vfu.lua
index 9b16357..a2e3b58 100644
--- a/math-vfu.lua
+++ b/math-vfu.lua
@@ -1126,7 +1126,7 @@ fonts.enc.math["tex-ma"] = {
     [0x024C7] = 0x72, -- circleR               \circledR
     [0x024C8] = 0x73, -- circleS               \circledS
     [0x022D4] = 0x74, -- fork                  \pitchfork
-    [0x02245] = 0x75, -- dotplus               \dotplus
+    [0x02214] = 0x75, -- dotplus               \dotplus
     [0x0223D] = 0x76, -- revsimilar            \backsim
     [0x022CD] = 0x77, -- revasymptequal        \backsimeq -- AM: Check this! I mapped it to simeq.
     [0x0231E] = 0x78, -- rightanglesw          \llcorner