diff --git a/core/src/processing/opengl/PGraphicsOpenGL.java b/core/src/processing/opengl/PGraphicsOpenGL.java
index b4f145eda6..8d2fe8310a 100644
--- a/core/src/processing/opengl/PGraphicsOpenGL.java
+++ b/core/src/processing/opengl/PGraphicsOpenGL.java
@@ -6256,7 +6256,7 @@ protected void blendModeImpl() {
                                   PGL.FUNC_ADD);
       }
       pgl.blendFuncSeparate(PGL.SRC_ALPHA, PGL.ONE_MINUS_SRC_ALPHA,
-                            PGL.ONE,       PGL.ONE);
+                            PGL.ONE,       PGL.ONE_MINUS_SRC_ALPHA);
 
     } else if (blendMode == ADD) {
       if (blendEqSupported) {