diff --git a/core/fpdfapi/page/cpdf_colorspace.cpp b/core/fpdfapi/page/cpdf_colorspace.cpp
index 2eef08b..bdbc335 100644
--- a/core/fpdfapi/page/cpdf_colorspace.cpp
+++ b/core/fpdfapi/page/cpdf_colorspace.cpp
@@ -1249,9 +1249,9 @@
   if (m_pBaseCS)
     return m_pBaseCS->GetRGB(results, R, G, B);
 
-  R = 0;
-  G = 0;
-  B = 0;
+  *R = 0.0f;
+  *G = 0.0f;
+  *B = 0.0f;
   return false;
 }