diff --git a/vtm/jni/builder/JniBuilder.java b/vtm/jni/builder/JniBuilder.java
index 55d957b8..567c9f25 100644
--- a/vtm/jni/builder/JniBuilder.java
+++ b/vtm/jni/builder/JniBuilder.java
@@ -1,4 +1,3 @@
-
 import com.badlogic.gdx.jnigen.AntScriptGenerator;
 import com.badlogic.gdx.jnigen.BuildConfig;
 import com.badlogic.gdx.jnigen.BuildTarget;
@@ -8,77 +7,80 @@ public class JniBuilder {
 	public static void main(String[] args) {
 		String[] headers = { "." };
 		String[] sources = {
-		    // Matrix stuff
-		    "gl/utils.c",
+		        // Matrix stuff
+		        "gl/utils.c",
 
-		    // libtessellate
-		    "tessellate/dict.c",
-		    "tessellate/mesh.c",
-		    "tessellate/render.c",
-		    "tessellate/tess.c",
-		    "tessellate/geom.c",
-		    "tessellate/memalloc.c",
-		    "tessellate/normal.c",
-		    "tessellate/priorityq.c",
-		    "tessellate/sweep.c",
-		    "tessellate/tessmono.c",
-		    "tessellate/tessellate.c",
-		    "tessellate/TessellateJni.c"
+		        // libtessellate
+		        "tessellate/dict.c",
+		        "tessellate/mesh.c",
+		        "tessellate/render.c",
+		        "tessellate/tess.c",
+		        "tessellate/geom.c",
+		        "tessellate/memalloc.c",
+		        "tessellate/normal.c",
+		        "tessellate/priorityq.c",
+		        "tessellate/sweep.c",
+		        "tessellate/tessmono.c",
+		        "tessellate/tessellate.c",
+		        "tessellate/TessellateJni.c"
 		};
 
 		String cflags = " -Wall -std=c99 -O2 -ffast-math";
 
-		BuildTarget win32home = BuildTarget.newDefaultTarget(TargetOs.Windows,
-		                                                     false);
-		win32home.compilerPrefix = "";
-		win32home.buildFileName = "build-windows32home.xml";
-		win32home.excludeFromMasterBuildFile = true;
-		win32home.headerDirs = headers;
-		win32home.cIncludes = sources;
-		win32home.cFlags += cflags;
-		win32home.cppFlags += cflags;
+		//BuildTarget win32home = BuildTarget
+		//    .newDefaultTarget(TargetOs.Windows, false);
+		//win32home.compilerPrefix = "";
+		//win32home.buildFileName = "build-windows32home.xml";
+		//win32home.excludeFromMasterBuildFile = true;
+		//win32home.headerDirs = headers;
+		//win32home.cIncludes = sources;
+		//win32home.cFlags += cflags;
+		//win32home.cppFlags += cflags;
 
-		BuildTarget win32 = BuildTarget.newDefaultTarget(TargetOs.Windows,
-		                                                 false);
+		BuildTarget win32 = BuildTarget
+		    .newDefaultTarget(TargetOs.Windows, false);
 		win32.headerDirs = headers;
 		win32.cIncludes = sources;
 		win32.cFlags += cflags;
 		win32.cppFlags += cflags;
 
 		BuildTarget win64 = BuildTarget
-		                               .newDefaultTarget(TargetOs.Windows, true);
+		    .newDefaultTarget(TargetOs.Windows, true);
 		win64.headerDirs = headers;
 		win64.cIncludes = sources;
 		win64.cFlags += cflags;
 		win64.cppFlags += cflags;
 
-		BuildTarget lin32 = BuildTarget.newDefaultTarget(TargetOs.Linux, false);
+		BuildTarget lin32 = BuildTarget
+		    .newDefaultTarget(TargetOs.Linux, false);
 		lin32.headerDirs = headers;
 		lin32.cIncludes = sources;
 		lin32.cFlags += cflags;
 		lin32.cppFlags += cflags;
 
-		BuildTarget lin64 = BuildTarget.newDefaultTarget(TargetOs.Linux, true);
+		BuildTarget lin64 = BuildTarget
+		    .newDefaultTarget(TargetOs.Linux, true);
 		lin64.headerDirs = headers;
 		lin64.cIncludes = sources;
 		lin64.cFlags += cflags;
 		lin64.cppFlags += cflags;
 
-		// BuildTarget mac = BuildTarget.newDefaultTarget(TargetOs.MacOsX,
-		// false);
-		// mac.headerDirs = headers;
-		// mac.cIncludes = sources;
-		// mac.cFlags += cflags;
-		// mac.cppFlags += cflags;
-		// mac.linkerFlags += " -framework CoreServices -framework Carbon";
+		BuildTarget mac = BuildTarget
+		    .newDefaultTarget(TargetOs.MacOsX, false);
+		mac.headerDirs = headers;
+		mac.cIncludes = sources;
+		mac.cFlags += cflags;
+		mac.cppFlags += cflags;
+		mac.linkerFlags += " -framework CoreServices -framework Carbon";
 
-		BuildTarget android = BuildTarget.newDefaultTarget(TargetOs.Android,
-		                                                   false);
+		BuildTarget android = BuildTarget
+		    .newDefaultTarget(TargetOs.Android, false);
 		android.headerDirs = headers;
 		android.cIncludes = sources;
 		android.cFlags += cflags;
 		android.cppFlags += cflags;
 		android.linkerFlags += " -llog";
+
 		// BuildTarget ios = BuildTarget.newDefaultTarget(TargetOs.IOS, false);
 		// ios.headerDirs = headers;
 		// ios.cIncludes = sources;
@@ -87,11 +89,16 @@ public class JniBuilder {
 
 		//new NativeCodeGenerator().generate();
 		new AntScriptGenerator().generate(new BuildConfig("vtm-jni"),
-		                                  //win32home, win32, win64, lin32,
-		                                  lin64, android);
+		                                  // mac,
+		                                  // win32home, 
+		                                  // win32,
+		                                  // win64,
+		                                  // lin32,
+		                                  lin64,
+		                                  android);
 
-		//		BuildExecutor.executeAnt("jni/build-windows32home.xml", "-v clean");
-		//		BuildExecutor.executeAnt("jni/build-windows32home.xml", "-v");
-		//		BuildExecutor.executeAnt("jni/build.xml", "pack-natives -v");
+		// BuildExecutor.executeAnt("jni/build-windows32home.xml", "-v clean");
+		// BuildExecutor.executeAnt("jni/build-windows32home.xml", "-v");
+		// BuildExecutor.executeAnt("jni/build.xml", "pack-natives -v");
 	}
 }
diff --git a/vtm/jni/gl/utils.c b/vtm/jni/gl/utils.c
index 4d693594..354d43af 100644
--- a/vtm/jni/gl/utils.c
+++ b/vtm/jni/gl/utils.c
@@ -3,10 +3,15 @@
 #include <stdlib.h>
 #include <math.h>
 #include <string.h>
-#include <alloca.h>
 #include <math.h>
 #include <stdint.h>
 
+#ifndef __WIN32__
+#include <alloca.h>
+#else
+#define alloca(size) __builtin_alloca(size)
+#endif
+
 //#ifndef uintptr_t
 //typedef unsigned long           uintptr_t;
 //#endif