diff --git a/internal/shaderir/glsl.go b/internal/shaderir/glsl.go
index 6874a0894..f24657ed7 100644
--- a/internal/shaderir/glsl.go
+++ b/internal/shaderir/glsl.go
@@ -86,8 +86,6 @@ func (p *Program) glslType(t *Type) string {
 	switch t.Main {
 	case None:
 		return "void"
-	case Image2D:
-		panic("not implemented")
 	case Array:
 		panic("not implemented")
 	case Struct:
@@ -101,8 +99,6 @@ func (p *Program) glslVarDecl(t *Type, varname string) string {
 	switch t.Main {
 	case None:
 		return "?(none)"
-	case Image2D:
-		panic("not implemented")
 	case Array:
 		panic("not implemented")
 	case Struct:
diff --git a/internal/shaderir/type.go b/internal/shaderir/type.go
index c46efaa09..3e3e324f5 100644
--- a/internal/shaderir/type.go
+++ b/internal/shaderir/type.go
@@ -47,8 +47,8 @@ func (t *Type) serialize() string {
 		return "mat3"
 	case Mat4:
 		return "mat4"
-	case Image2D:
-		return "image2d"
+	case Sampler2D:
+		return "sampler2D"
 	case Array:
 		return fmt.Sprintf("%s[%d]", t.Sub[0].serialize(), t.Length)
 	case Struct:
@@ -78,7 +78,7 @@ const (
 	Mat2
 	Mat3
 	Mat4
-	Image2D
+	Sampler2D
 	Array
 	Struct
 )
@@ -105,8 +105,8 @@ func (t BasicType) Glsl() string {
 		return "mat3"
 	case Mat4:
 		return "mat4"
-	case Image2D:
-		return "?(image2d)"
+	case Sampler2D:
+		return "sampler2D"
 	case Array:
 		// First-class array is not available on GLSL ES 2.
 		return "?(array)"