diff --git a/source/src/command.cpp b/source/src/command.cpp
index d665ee09..a1e74683 100644
--- a/source/src/command.cpp
+++ b/source/src/command.cpp
@@ -709,7 +709,7 @@ int mul(int a, int b)   { return a*b; }            COMMANDN(*, mul, ARG_2EXP);
 int sub(int a, int b)   { return a-b; }            COMMANDN(-, sub, ARG_2EXP);
 int divi(int a, int b)  { return b ? a/b : 0; }    COMMANDN(div, divi, ARG_2EXP);
 int mod(int a, int b)   { return b ? a%b : 0; }    COMMAND(mod, ARG_2EXP);
-int nota(int a) { return (int)(!a); }              COMMANDN(!=, nota, ARG_1EXP);
+int nota(int a) { return (int)(!a); }              COMMANDN(!, nota, ARG_1EXP);
 int equal(int a, int b) { return (int)(a==b); }    COMMANDN(=, equal, ARG_2EXP);
 int notequal(int a, int b) { return (int)(a!=b); } COMMANDN(!=, notequal, ARG_2EXP);
 int lt(int a, int b)    { return (int)(a<b); }     COMMANDN(<, lt, ARG_2EXP);