diff -r 1a0c7080d571 modules/graphics/src/main/native-prism/Renderer.c
--- a/modules/graphics/src/main/native-prism/Renderer.c	Fri Jun 17 12:47:34 2016 +1200
+++ b/modules/graphics/src/main/native-prism/Renderer.c	Mon Jun 20 22:46:24 2016 -0400
@@ -350,7 +350,7 @@
 static jint SUBPIXEL_MASK_X;
 static jint SUBPIXEL_MASK_Y;
 //static jint MAX_AA_ALPHA;
-static jbyte *alphaMap;
+static jbyte *alphaMap = 0;
 
 static void setMaxAlpha(jint maxalpha);
 
@@ -610,6 +610,9 @@
 static void setMaxAlpha(jint maxalpha) {
     jint i;
 
+    if (alphaMap != 0) {
+        free(alphaMap);
+    }
     alphaMap = malloc(maxalpha+1);
     for (i = 0; i <= maxalpha; i++) {
         alphaMap[i] = (jbyte) ((i*255 + maxalpha/2)/maxalpha);