diff --git a/Docs/src/history.but b/Docs/src/history.but
index 95de8b17..83bf6c23 100644
--- a/Docs/src/history.but
+++ b/Docs/src/history.but
@@ -28,7 +28,7 @@ Released on ?, 2014
 
 \b !execute supports comparing the exit code with the same syntax as !system
 
-\b Preprocessor supports MASM style 0n and 0y radix prefix on numbers
+\b Preprocessor supports \cw{0n} and \cw{0b} radix prefix on number literals
 
 \H{v3.0a2} 3.0 Alpha 2
 
diff --git a/Source/lineparse.cpp b/Source/lineparse.cpp
index 3d33af8b..5768a9d2 100644
--- a/Source/lineparse.cpp
+++ b/Source/lineparse.cpp
@@ -116,9 +116,9 @@ int LineParser::gettoken_int(int token, int *success/*=0*/) const
     ++p, ++neg;
   if (_T('0') == p[0])
   {
-    // Special support for 0n and 0y MASM style radix prefix:
+    // Special support for 0n and 0y MASM style and 0b Python style radix prefix:
     if (_T('n') == (p[1]|32)) parse=&p[2], base=10;
-    if (_T('y') == (p[1]|32)) parse=&p[2], base=2;
+    if (_T('b') == (p[1]|32) || _T('y') == (p[1]|32)) parse=&p[2], base=2;
   }
   if (neg)
   {
@@ -142,7 +142,7 @@ double LineParser::gettoken_number(int token, int *success/*=0*/) const
   {
     if (_T('x') == (str[1]|32)) ++forceint;
     if (_T('n') == (str[1]|32)) ++forceint;
-    if (_T('y') == (str[1]|32)) ++forceint;
+    if (_T('b') == (str[1]|32) || _T('y') == (str[1]|32)) ++forceint;
   }
   return forceint ? gettoken_int(token,success) : gettoken_float(token,success);
 }