diff --git a/code/IRRLoader.cpp b/code/IRRLoader.cpp
index 2b95cbe6f..f0944ceb1 100644
--- a/code/IRRLoader.cpp
+++ b/code/IRRLoader.cpp
@@ -56,8 +56,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "StandardShapes.h"
 #include "Importer.h"
 
-// We need boost::common_factor to compute the lcm/gcd of a number
-#include <boost/math/common_factor_rt.hpp>
+// We need Math.h to compute the lcm/gcd of a number
+#include "Math.h"
 #include <memory>
 #include "../include/assimp/DefaultLogger.hpp"
 #include "../include/assimp/mesh.h"
@@ -402,13 +402,13 @@ void IRRImporter::ComputeAnimations(Node* root, aiNode* real, std::vector<aiNode
                 int lcm = 360;
 
                 if (angles[0])
-                    lcm  = boost::math::lcm(lcm,angles[0]);
+                    lcm  = Math::lcm(lcm,angles[0]);
 
                 if (angles[1])
-                    lcm  = boost::math::lcm(lcm,angles[1]);
+                    lcm  = Math::lcm(lcm,angles[1]);
 
                 if (angles[2])
-                    lcm  = boost::math::lcm(lcm,angles[2]);
+                    lcm  = Math::lcm(lcm,angles[2]);
 
                 if (360 == lcm)
                     break;
diff --git a/code/Math.h b/code/Math.h
new file mode 100644
index 000000000..57204fc68
--- /dev/null
+++ b/code/Math.h
@@ -0,0 +1,77 @@
+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2016, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+  copyright notice, this list of conditions and the
+  following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the
+  following disclaimer in the documentation and/or other
+  materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+  contributors may be used to endorse or promote products
+  derived from this software without specific prior
+  written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+
+/** @file  Math.h
+ *  @brief Implementation of the math functions (gcd and lcm)
+ *
+ *  Copied from BoostWorkaround/math
+ */
+
+namespace Assimp {
+namespace Math {
+
+// TODO: use binary GCD for unsigned integers ....
+template < typename IntegerType >
+IntegerType  gcd( IntegerType a, IntegerType b )
+{
+	const IntegerType zero = (IntegerType)0;
+	while ( true )
+	{
+		if ( a == zero )
+			return b;
+		b %= a;
+
+		if ( b == zero )
+			return a;
+		a %= b;
+	}
+}
+
+template < typename IntegerType >
+IntegerType  lcm( IntegerType a, IntegerType b )
+{
+	const IntegerType t = gcd (a,b);
+	if (!t)return t;
+	return a / t * b;
+}
+
+}
+}