GL33.GL_SRC1_ALPHA is missing

GL_SRC1_ALPHA was introduced in OpenGL 1.5, as an alias for GL_SOURCE1_ALPHA in OpenGL 1.3. The 3.3 release introduced the following only:

GL_SRC1_COLOR
GL_ONE_MINUS_SRC1_COLOR
GL_ONE_MINUS_SRC1_ALPHA

Oh.

Was just porting my code to LWJGL 3. LWJGL 2 had GL33.GL_SRC1_ALPHA so I thought there was a mistake.

Thanks for clearing that up.

Yes, LWJGL 2 had it but it's been removed from there too. It was causing conflicts when used with static imports.