diff --git a/src/AbstractShaderProgram.cpp b/src/AbstractShaderProgram.cpp
index 854e86fea..2f390ade3 100644
--- a/src/AbstractShaderProgram.cpp
+++ b/src/AbstractShaderProgram.cpp
@@ -599,8 +599,10 @@ std::size_t Attribute<GLfloat>::size(GLint components, DataType dataType) {
         case DataType::Int:
         case DataType::Float:
             return 4*components;
+        #ifndef MAGNUM_TARGET_GLES
         case DataType::Double:
             return 8*components;
+        #endif
     }
 
     CORRADE_INTERNAL_ASSERT(false);
@@ -624,7 +626,7 @@ std::size_t Attribute<GLint>::size(GLint components, DataType dataType) {
     return 0;
 }
 
-
+#ifndef MAGNUM_TARGET_GLES
 std::size_t Attribute<GLdouble>::size(GLint components, DataType dataType) {
     switch(dataType) {
         case DataType::Double:
@@ -634,6 +636,7 @@ std::size_t Attribute<GLdouble>::size(GLint components, DataType dataType) {
     CORRADE_INTERNAL_ASSERT(false);
     return 0;
 }
+#endif
 
 std::size_t Attribute<Math::Vector<4, GLfloat>>::size(GLint components, DataType dataType) {
     switch(dataType) {
@@ -648,13 +651,17 @@ std::size_t Attribute<Math::Vector<4, GLfloat>>::size(GLint components, DataType
         case DataType::Int:
         case DataType::Float:
             return 4*components;
+        #ifndef MAGNUM_TARGET_GLES
         case DataType::Double:
             return 8*components;
+        #endif
 
+        #ifndef MAGNUM_TARGET_GLES2
         case DataType::UnsignedInt2101010REV:
         case DataType::Int2101010REV:
             CORRADE_INTERNAL_ASSERT(components == 4);
             return 4;
+        #endif
     }
 
     CORRADE_INTERNAL_ASSERT(false);
diff --git a/src/AbstractShaderProgram.h b/src/AbstractShaderProgram.h
index cb16c0b2a..07fd6fa4f 100644
--- a/src/AbstractShaderProgram.h
+++ b/src/AbstractShaderProgram.h
@@ -1163,7 +1163,7 @@ template<> struct Attribute<Math::Vector<4, GLfloat>> {
         return options & DataOption::BGRA ? GL_BGRA : 4;
     }
     #else
-    inline constexpr static GLint components(DataOptions) { return 4; }
+    inline constexpr static GLint components(DataOptions = {}) { return 4; }
     #endif
 
     static std::size_t MAGNUM_EXPORT size(GLint components, DataType dataType);