diff --git a/examples_cuda/rt/Makefile b/examples_cuda/rt/Makefile
index b36fa0f2..4521f68c 100644
--- a/examples_cuda/rt/Makefile
+++ b/examples_cuda/rt/Makefile
@@ -1,7 +1,7 @@
 
 EXAMPLE=rt
 CPP_SRC=rt.cpp rt_serial.cpp
-ISPC_SRC=rt.ispc
+ISPC_SRC=rt1.ispc
 ISPC_IA_TARGETS=avx
 
 include ../common.mk
diff --git a/examples_cuda/rt/rt_cu.cpp b/examples_cuda/rt/rt_cu.cpp
index 09db9d62..42b52fc0 100644
--- a/examples_cuda/rt/rt_cu.cpp
+++ b/examples_cuda/rt/rt_cu.cpp
@@ -153,7 +153,7 @@ CUmodule loadModule(const char * module)
   optionVals[5] = (void*) 1;
   // Max # of registers/pthread
   options[6] = CU_JIT_MAX_REGISTERS;
-  int jitRegCount = 48;
+  int jitRegCount = 32;
   optionVals[6] = (void *)(size_t)jitRegCount;
 
   // Create a pending linker invocation