diff --git a/lib/mathlib.cpp b/lib/mathlib.cpp
index 309008ff3..837441ff5 100644
--- a/lib/mathlib.cpp
+++ b/lib/mathlib.cpp
@@ -505,7 +505,7 @@ bool MathLib::isDec(const std::string & s)
 
 bool MathLib::isInt(const std::string & s)
 {
-    return isDec(s) || isHex(s) || isOct(s);
+    return isDec(s) || isHex(s) || isOct(s) || isBin(s);
 }
 
 std::string MathLib::add(const std::string & first, const std::string & second)
diff --git a/test/testmathlib.cpp b/test/testmathlib.cpp
index 04ca3a41a..a20337c68 100644
--- a/test/testmathlib.cpp
+++ b/test/testmathlib.cpp
@@ -274,6 +274,8 @@ private:
 
         ASSERT_EQUALS(true , MathLib::isInt("0xff"));
         ASSERT_EQUALS(true , MathLib::isInt("0xa"));
+        ASSERT_EQUALS(true , MathLib::isInt("0b1000"));
+        ASSERT_EQUALS(true , MathLib::isInt("0B1000"));
         ASSERT_EQUALS(true , MathLib::isInt("0l"));
         ASSERT_EQUALS(true , MathLib::isInt("0L"));
         ASSERT_EQUALS(true , MathLib::isInt("0ul"));