diff --git a/patch/patches/renderer_host_1161.patch b/patch/patches/renderer_host_1161.patch
index 723ca5b71..b881d823e 100644
--- a/patch/patches/renderer_host_1161.patch
+++ b/patch/patches/renderer_host_1161.patch
@@ -25,18 +25,19 @@ index e948863..0031eaa 100644
    }
  
 diff --git compositing_iosurface_shader_programs_mac.cc compositing_iosurface_shader_programs_mac.cc
-index 87f0f34..342bdfc 100644
+index 87f0f34..0fdc564 100644
 --- compositing_iosurface_shader_programs_mac.cc
 +++ compositing_iosurface_shader_programs_mac.cc
-@@ -11,6 +11,7 @@
+@@ -11,6 +11,8 @@
  #include "base/debug/trace_event.h"
  #include "base/logging.h"
  #include "base/memory/scoped_ptr.h"
 +#include "base/strings/stringprintf.h"
++#include "base/strings/string_number_conversions.h"
  #include "base/values.h"
  #include "content/browser/gpu/gpu_data_manager_impl.h"
  #include "gpu/config/gpu_driver_bug_workaround_type.h"
-@@ -51,6 +52,7 @@ const char kfsBlit[] = GLSL_PROGRAM_AS_STRING(
+@@ -51,6 +53,7 @@ const char kfsBlit[] = GLSL_PROGRAM_AS_STRING(
      }
  );
  
@@ -44,7 +45,7 @@ index 87f0f34..342bdfc 100644
  
  // Only calculates position.
  const char kvsSolidWhite[] = GLSL_PROGRAM_AS_STRING(
-@@ -238,6 +240,16 @@ GLuint CompileShaderGLSL(ShaderProgram shader_program, GLenum shader_type,
+@@ -238,6 +241,18 @@ GLuint CompileShaderGLSL(ShaderProgram shader_program, GLenum shader_type,
    const GLuint shader = glCreateShader(shader_type);
    DCHECK_NE(shader, 0u);
  
@@ -53,15 +54,17 @@ index 87f0f34..342bdfc 100644
 +  if (shader_program == SHADER_PROGRAM_SOLID_WHITE &&
 +      shader_type == GL_FRAGMENT_SHADER) {
 +    bg_shader = base::StringPrintf(
-+        "void main() { gl_FragColor = vec4(%f, %f, %f, 1.0); }",
-+        bgcolor[0], bgcolor[1], bgcolor[2]);
++        "void main() { gl_FragColor = vec4(%s, %s, %s, 1.0); }",
++        base::DoubleToString(bgcolor[0]).c_str(),
++        base::DoubleToString(bgcolor[1]).c_str(),
++        base::DoubleToString(bgcolor[2]).c_str());
 +    kFragmentShaderSourceCodeMap[shader_program] = bg_shader.c_str();
 +  }
 +
    // Select and compile the shader program source code.
    if (shader_type == GL_VERTEX_SHADER) {
      const GLchar* source_snippets[] = {
-@@ -414,6 +426,14 @@ void CompositingIOSurfaceShaderPrograms::SetOutputFormatForTesting(
+@@ -414,6 +429,14 @@ void CompositingIOSurfaceShaderPrograms::SetOutputFormatForTesting(
    Reset();
  }