diff --git a/hbasm/src/lib.rs b/hbasm/src/lib.rs
index f939838..e2201b8 100644
--- a/hbasm/src/lib.rs
+++ b/hbasm/src/lib.rs
@@ -62,7 +62,7 @@ tokendef![
     "nop", "add", "sub", "mul", "and", "or", "xor", "sl", "sr", "srs", "cmp", "cmpu",
     "dir", "neg", "not", "addi", "muli", "andi", "ori", "xori", "sli", "sri", "srsi",
     "cmpi", "cmpui", "cp", "swa", "li", "ld", "st", "bmc", "brc", "jmp", "jeq", "jne",
-    "jlt", "jgt", "jltu", "jgtu", "ecall", "addf", "subf", "mulf", "dirf", "fma", "negf",
+    "jlt", "jgt", "jltu", "jgtu", "ecall", "addf", "subf", "mulf", "dirf", "fmaf", "negf",
     "itf", "fti", "addfi", "mulfi",
 ];
 
diff --git a/hbbytecode/hbbytecode.h b/hbbytecode/hbbytecode.h
index 10eebac..307ca92 100644
--- a/hbbytecode/hbbytecode.h
+++ b/hbbytecode/hbbytecode.h
@@ -17,7 +17,7 @@ enum hbbc_Opcode: uint8_t {
     hbbc_Op_CMPUI , hbbc_Op_CP    , hbbc_Op_SWA  , hbbc_Op_LI    , hbbc_Op_LD   , hbbc_Op_ST   ,
     hbbc_Op_BMC   , hbbc_Op_BRC   , hbbc_Op_JMP  , hbbc_Op_JEQ   , hbbc_Op_JNE  , hbbc_Op_JLT  ,
     hbbc_Op_JGT   , hbbc_Op_JLTU  , hbbc_Op_JGTU , hbbc_Op_ECALL , hbbc_Op_ADDF , hbbc_Op_SUBF ,
-    hbbc_Op_MULF  , hbbc_Op_DIRF  , hbbc_Op_FMA  , hbbc_Op_NEGF  , hbbc_Op_ITF  , hbbc_Op_FTI  ,
+    hbbc_Op_MULF  , hbbc_Op_DIRF  , hbbc_Op_FMAF , hbbc_Op_NEGF  , hbbc_Op_ITF  , hbbc_Op_FTI  ,
     hbbc_Op_ADDFI , hbbc_Op_MULFI ,
 } typedef hbbc_Opcode;
 
diff --git a/hbbytecode/src/lib.rs b/hbbytecode/src/lib.rs
index 6e85797..19f4648 100644
--- a/hbbytecode/src/lib.rs
+++ b/hbbytecode/src/lib.rs
@@ -67,7 +67,7 @@ constmod!(pub opcode(u8) {
     SUBF = 41, "BBB; #0 ← #1 -. #2";
     MULF = 42, "BBB; #0 ← #1 +. #2";
     DIRF = 43, "BBBB; #0 ← #2 / #3, #1 ← #2 % #3";
-    FMA  = 44, "BBBB; #0 ← (#1 * #2) + #3";
+    FMAF = 44, "BBBB; #0 ← (#1 * #2) + #3";
     NEGF = 45, "BB; #0 ← -#1";
     ITF  = 46, "BB; #0 ← #1 as float";
     FTI  = 47, "BB; #0 ← #1 as int";
diff --git a/hbvm/src/vm/mod.rs b/hbvm/src/vm/mod.rs
index 8375706..0f6fa2f 100644
--- a/hbvm/src/vm/mod.rs
+++ b/hbvm/src/vm/mod.rs
@@ -284,7 +284,7 @@ impl<'a, T: HandleTrap> Vm<'a, T> {
                         self.write_reg(dt, a0 / a1);
                         self.write_reg(rt, a0 % a1);
                     }
-                    FMA => {
+                    FMAF => {
                         let ParamBBBB(dt, a0, a1, a2) = param!(self, ParamBBBB);
                         self.write_reg(
                             dt,
diff --git a/spec.md b/spec.md
index 4dc2291..4c64f26 100644
--- a/spec.md
+++ b/spec.md
@@ -214,7 +214,7 @@
 
 | Opcode | Name |        Action         |
 |:------:|:----:|:---------------------:|
-|   44   | FMA  | `#0 ← (#1 * #2) + #3` |
+|   44   | FMAF | `#0 ← (#1 * #2) + #3` |
 
 ### Negation
 - Type BB