diff --git a/tests/masked-scatter-struct.ispc b/tests/masked-scatter-struct.ispc
index 19df4bd0..e0c195a1 100644
--- a/tests/masked-scatter-struct.ispc
+++ b/tests/masked-scatter-struct.ispc
@@ -5,8 +5,8 @@ struct Foo { float x; float y; };
 
 export void f_fu(uniform float ret[], uniform float aa[], uniform float b) {
     float a = aa[programIndex];
-    uniform Foo foo[programCount];
-    for (uniform int i = 0; i < programCount; ++i) {
+    uniform Foo foo[programCount+1];
+    for (uniform int i = 0; i < programCount+1; ++i) {
         foo[i].x = i;
         foo[i].y = -1234 + i;
     }
diff --git a/tests/masked-scatter-vector.ispc b/tests/masked-scatter-vector.ispc
index 676cbfff..9dda07f0 100644
--- a/tests/masked-scatter-vector.ispc
+++ b/tests/masked-scatter-vector.ispc
@@ -5,8 +5,8 @@ typedef int<3> int3;
 
 export void f_fu(uniform float ret[], uniform float aa[], uniform float b) {
     float a = aa[programIndex];
-    uniform int3 array[programCount];
-    for (uniform int i = 0; i < programCount + 5 - b; ++i) {
+    uniform int3 array[programCount+1];
+    for (uniform int i = 0; i < programCount + 6 - b; ++i) {
         for (uniform int j = 0; j < 3; ++j)
             array[i][j] = i+100*j;
     }