diff --git a/src/image/internal/imageutil/gen.go b/src/image/internal/imageutil/gen.go
index b9158d0ce9..6792b28a45 100644
--- a/src/image/internal/imageutil/gen.go
+++ b/src/image/internal/imageutil/gen.go
@@ -133,10 +133,13 @@ const sratioCase = `
 					b = ^(b >> 31)
 				}
 
-				dpix[x+0] = uint8(r)
-				dpix[x+1] = uint8(g)
-				dpix[x+2] = uint8(b)
-				dpix[x+3] = 255
+
+				// use a temp slice to hint to the compiler that a single bounds check suffices
+				rgba := dpix[x : x+4 : len(dpix)]
+				rgba[0] = uint8(r)
+				rgba[1] = uint8(g)
+				rgba[2] = uint8(b)
+				rgba[3] = 255
 			}
 		}
 `
diff --git a/src/image/internal/imageutil/impl.go b/src/image/internal/imageutil/impl.go
index 39b455fdfa..3696b08e41 100644
--- a/src/image/internal/imageutil/impl.go
+++ b/src/image/internal/imageutil/impl.go
@@ -82,10 +82,12 @@ func DrawYCbCr(dst *image.RGBA, r image.Rectangle, src *image.YCbCr, sp image.Po
 					b = ^(b >> 31)
 				}
 
-				dpix[x+0] = uint8(r)
-				dpix[x+1] = uint8(g)
-				dpix[x+2] = uint8(b)
-				dpix[x+3] = 255
+				// use a temp slice to hint to the compiler that a single bounds check suffices
+				rgba := dpix[x : x+4 : len(dpix)]
+				rgba[0] = uint8(r)
+				rgba[1] = uint8(g)
+				rgba[2] = uint8(b)
+				rgba[3] = 255
 			}
 		}
 
@@ -137,10 +139,12 @@ func DrawYCbCr(dst *image.RGBA, r image.Rectangle, src *image.YCbCr, sp image.Po
 					b = ^(b >> 31)
 				}
 
-				dpix[x+0] = uint8(r)
-				dpix[x+1] = uint8(g)
-				dpix[x+2] = uint8(b)
-				dpix[x+3] = 255
+				// use a temp slice to hint to the compiler that a single bounds check suffices
+				rgba := dpix[x : x+4 : len(dpix)]
+				rgba[0] = uint8(r)
+				rgba[1] = uint8(g)
+				rgba[2] = uint8(b)
+				rgba[3] = 255
 			}
 		}
 
@@ -192,10 +196,12 @@ func DrawYCbCr(dst *image.RGBA, r image.Rectangle, src *image.YCbCr, sp image.Po
 					b = ^(b >> 31)
 				}
 
-				dpix[x+0] = uint8(r)
-				dpix[x+1] = uint8(g)
-				dpix[x+2] = uint8(b)
-				dpix[x+3] = 255
+				// use a temp slice to hint to the compiler that a single bounds check suffices
+				rgba := dpix[x : x+4 : len(dpix)]
+				rgba[0] = uint8(r)
+				rgba[1] = uint8(g)
+				rgba[2] = uint8(b)
+				rgba[3] = 255
 			}
 		}
 
@@ -246,10 +252,12 @@ func DrawYCbCr(dst *image.RGBA, r image.Rectangle, src *image.YCbCr, sp image.Po
 					b = ^(b >> 31)
 				}
 
-				dpix[x+0] = uint8(r)
-				dpix[x+1] = uint8(g)
-				dpix[x+2] = uint8(b)
-				dpix[x+3] = 255
+				// use a temp slice to hint to the compiler that a single bounds check suffices
+				rgba := dpix[x : x+4 : len(dpix)]
+				rgba[0] = uint8(r)
+				rgba[1] = uint8(g)
+				rgba[2] = uint8(b)
+				rgba[3] = 255
 			}
 		}