diff --git a/tests/GrGLSLPrettyPrintTest.cpp b/tests/GrGLSLPrettyPrintTest.cpp
index 827a27b..1a5152f 100644
--- a/tests/GrGLSLPrettyPrintTest.cpp
+++ b/tests/GrGLSLPrettyPrintTest.cpp
@@ -5,6 +5,8 @@
  * found in the LICENSE file.
  */
 
+#include "SkTypes.h"
+
 #if SK_SUPPORT_GPU
 #include "Test.h"
 #include "gl/GrGLSLPrettyPrint.h"
@@ -117,7 +119,7 @@
 
     // Just test we don't crash with garbage input
     ASSERT(GrGLSLPrettyPrint::PrettyPrintGLSL(testStr.begin(), lengths.begin(), 1,
-                                              true).c_str() != NULL);
+                                              true).c_str() != nullptr);
 }
 
 #endif