diff --git a/progs/glsl/CH06-brick.frag.txt b/progs/glsl/CH06-brick.frag
similarity index 100%
rename from progs/glsl/CH06-brick.frag.txt
rename to progs/glsl/CH06-brick.frag
diff --git a/progs/glsl/CH06-brick.vert.txt b/progs/glsl/CH06-brick.vert
similarity index 100%
rename from progs/glsl/CH06-brick.vert.txt
rename to progs/glsl/CH06-brick.vert
diff --git a/progs/glsl/CH11-bumpmap.frag.txt b/progs/glsl/CH11-bumpmap.frag
similarity index 100%
rename from progs/glsl/CH11-bumpmap.frag.txt
rename to progs/glsl/CH11-bumpmap.frag
diff --git a/progs/glsl/CH11-bumpmap.vert.txt b/progs/glsl/CH11-bumpmap.vert
similarity index 100%
rename from progs/glsl/CH11-bumpmap.vert.txt
rename to progs/glsl/CH11-bumpmap.vert
diff --git a/progs/glsl/CH11-toyball.frag.txt b/progs/glsl/CH11-toyball.frag
similarity index 100%
rename from progs/glsl/CH11-toyball.frag.txt
rename to progs/glsl/CH11-toyball.frag
diff --git a/progs/glsl/CH11-toyball.vert.txt b/progs/glsl/CH11-toyball.vert
similarity index 100%
rename from progs/glsl/CH11-toyball.vert.txt
rename to progs/glsl/CH11-toyball.vert
diff --git a/progs/glsl/CH18-mandel.frag.txt b/progs/glsl/CH18-mandel.frag
similarity index 100%
rename from progs/glsl/CH18-mandel.frag.txt
rename to progs/glsl/CH18-mandel.frag
diff --git a/progs/glsl/CH18-mandel.vert.txt b/progs/glsl/CH18-mandel.vert
similarity index 100%
rename from progs/glsl/CH18-mandel.vert.txt
rename to progs/glsl/CH18-mandel.vert
diff --git a/progs/glsl/brick.c b/progs/glsl/brick.c
index 4be266622b5..526ef0e2e36 100644
--- a/progs/glsl/brick.c
+++ b/progs/glsl/brick.c
@@ -16,8 +16,8 @@
 #include "shaderutil.h"
 
 
-static char *FragProgFile = "CH06-brick.frag.txt";
-static char *VertProgFile = "CH06-brick.vert.txt";
+static char *FragProgFile = "CH06-brick.frag";
+static char *VertProgFile = "CH06-brick.vert";
 
 /* program/shader objects */
 static GLuint fragShader;
diff --git a/progs/glsl/bump.c b/progs/glsl/bump.c
index e42421d489a..a2e0916861c 100644
--- a/progs/glsl/bump.c
+++ b/progs/glsl/bump.c
@@ -16,8 +16,8 @@
 #include "shaderutil.h"
 
 
-static char *FragProgFile = "CH11-bumpmap.frag.txt";
-static char *VertProgFile = "CH11-bumpmap.vert.txt";
+static char *FragProgFile = "CH11-bumpmap.frag";
+static char *VertProgFile = "CH11-bumpmap.vert";
 
 /* program/shader objects */
 static GLuint fragShader;
diff --git a/progs/glsl/cubemap.frag.txt b/progs/glsl/cubemap.frag
similarity index 100%
rename from progs/glsl/cubemap.frag.txt
rename to progs/glsl/cubemap.frag
diff --git a/progs/glsl/mandelbrot.c b/progs/glsl/mandelbrot.c
index fa67a3c2cae..e6361b429b3 100644
--- a/progs/glsl/mandelbrot.c
+++ b/progs/glsl/mandelbrot.c
@@ -16,8 +16,8 @@
 #include "shaderutil.h"
 
 
-static char *FragProgFile = "CH18-mandel.frag.txt";
-static char *VertProgFile = "CH18-mandel.vert.txt";
+static char *FragProgFile = "CH18-mandel.frag";
+static char *VertProgFile = "CH18-mandel.vert";
 
 /* program/shader objects */
 static GLuint fragShader;
diff --git a/progs/glsl/multitex.c b/progs/glsl/multitex.c
index 5574ed4139f..096d40f64d7 100644
--- a/progs/glsl/multitex.c
+++ b/progs/glsl/multitex.c
@@ -35,8 +35,8 @@
 
 static const char *Demo = "multitex";
 
-static const char *VertFile = "multitex.vert.txt";
-static const char *FragFile = "multitex.frag.txt";
+static const char *VertFile = "multitex.vert";
+static const char *FragFile = "multitex.frag";
 
 static const char *TexFiles[2] = 
    {
diff --git a/progs/glsl/multitex.frag.txt b/progs/glsl/multitex.frag
similarity index 100%
rename from progs/glsl/multitex.frag.txt
rename to progs/glsl/multitex.frag
diff --git a/progs/glsl/multitex.vert.txt b/progs/glsl/multitex.vert
similarity index 100%
rename from progs/glsl/multitex.vert.txt
rename to progs/glsl/multitex.vert
diff --git a/progs/glsl/reflect.vert.txt b/progs/glsl/reflect.vert
similarity index 100%
rename from progs/glsl/reflect.vert.txt
rename to progs/glsl/reflect.vert
diff --git a/progs/glsl/shadowtex.frag.txt b/progs/glsl/shadowtex.frag
similarity index 100%
rename from progs/glsl/shadowtex.frag.txt
rename to progs/glsl/shadowtex.frag
diff --git a/progs/glsl/simple.vert.txt b/progs/glsl/simple.vert
similarity index 100%
rename from progs/glsl/simple.vert.txt
rename to progs/glsl/simple.vert
diff --git a/progs/glsl/texdemo1.c b/progs/glsl/texdemo1.c
index 3dd19eaf4bf..41010746eea 100644
--- a/progs/glsl/texdemo1.c
+++ b/progs/glsl/texdemo1.c
@@ -35,11 +35,11 @@
 
 static const char *Demo = "texdemo1";
 
-static const char *ReflectVertFile = "reflect.vert.txt";
-static const char *CubeFragFile = "cubemap.frag.txt";
+static const char *ReflectVertFile = "reflect.vert";
+static const char *CubeFragFile = "cubemap.frag";
 
-static const char *SimpleVertFile = "simple.vert.txt";
-static const char *SimpleTexFragFile = "shadowtex.frag.txt";
+static const char *SimpleVertFile = "simple.vert";
+static const char *SimpleTexFragFile = "shadowtex.frag";
 
 static const char *GroundImage = "../images/tile.rgb";
 
diff --git a/progs/glsl/toyball.c b/progs/glsl/toyball.c
index b870435f662..2daaedd6df8 100644
--- a/progs/glsl/toyball.c
+++ b/progs/glsl/toyball.c
@@ -16,8 +16,8 @@
 #include "shaderutil.h"
 
 
-static char *FragProgFile = "CH11-toyball.frag.txt";
-static char *VertProgFile = "CH11-toyball.vert.txt";
+static char *FragProgFile = "CH11-toyball.frag";
+static char *VertProgFile = "CH11-toyball.vert";
 
 /* program/shader objects */
 static GLuint fragShader;