diff --git a/progs/glsl/multitex.frag b/progs/glsl/multitex.frag
index a2633ce..9b3c4c2 100644
--- a/progs/glsl/multitex.frag
+++ b/progs/glsl/multitex.frag
@@ -4,8 +4,42 @@
 // Composite second texture over first.
 // We're assuming the 2nd texture has a meaningful alpha channel.
 
+uniform sampler2D tex0;
 uniform sampler2D tex1;
 uniform sampler2D tex2;
+uniform sampler2D tex3;
+uniform sampler2D tex4;
+uniform sampler2D tex5;
+uniform sampler2D tex6;
+uniform sampler2D tex7;
+uniform sampler2D tex8;
+uniform sampler2D tex9;
+uniform sampler2D texa;
+uniform sampler2D texb;
+uniform sampler2D texc;
+uniform sampler2D texd;
+uniform sampler2D texe;
+uniform sampler2D texf;
+uniform sampler2D texg;
+uniform sampler2D texh;
+uniform sampler2D texi;
+uniform sampler2D texj;
+uniform sampler2D texk;
+uniform sampler2D texl;
+uniform sampler2D texm;
+uniform sampler2D texn;
+uniform sampler2D texo;
+uniform sampler2D texp;
+uniform sampler2D texq;
+uniform sampler2D texr;
+uniform sampler2D texs;
+uniform sampler2D text;
+uniform sampler2D texu;
+uniform sampler2D texv;
+uniform sampler2D texw;
+uniform sampler2D texx;
+uniform sampler2D texy;
+uniform sampler2D texz;
 
 void main()
 {