diff --git a/gst-libs/gst/gl/gstgldownload.c b/gst-libs/gst/gl/gstgldownload.c
index dcd39c967c..b238222070 100644
--- a/gst-libs/gst/gl/gstgldownload.c
+++ b/gst-libs/gst/gl/gstgldownload.c
@@ -81,7 +81,7 @@ static void _do_download_draw_yuv_gles2 (GstGLDisplay * display,
 #if GST_GL_HAVE_OPENGL
 /* YUY2:y2,u,y1,v
    UYVY:v,y1,u,y2 */
-static gchar *text_shader_YUY2_UYVY_opengl =
+static const gchar *text_shader_YUY2_UYVY_opengl =
     "#extension GL_ARB_texture_rectangle : enable\n"
     "uniform sampler2DRect tex;\n"
     RGB_TO_YUV_COEFFICIENTS
@@ -103,7 +103,7 @@ static gchar *text_shader_YUY2_UYVY_opengl =
     "  gl_FragColor=vec4(%s);\n"
     "}\n";
 
-static gchar *text_shader_I420_YV12_opengl =
+static const gchar *text_shader_I420_YV12_opengl =
     "#extension GL_ARB_texture_rectangle : enable\n"
     "uniform sampler2DRect tex;\n"
     "uniform float w, h;\n"
@@ -126,7 +126,7 @@ static gchar *text_shader_I420_YV12_opengl =
     "  gl_FragData[2] = vec4(v, 0.0, 0.0, 1.0);\n"
     "}\n";
 
-static gchar *text_shader_AYUV_opengl =
+static const gchar *text_shader_AYUV_opengl =
     "#extension GL_ARB_texture_rectangle : enable\n"
     "uniform sampler2DRect tex;\n"
     RGB_TO_YUV_COEFFICIENTS
@@ -148,7 +148,7 @@ static gchar *text_shader_AYUV_opengl =
 #endif /* GST_GL_HAVE_OPENGL */
 
 #if GST_GL_HAVE_GLES2
-static gchar *text_shader_YUY2_UYVY_gles2 =
+static const gchar *text_shader_YUY2_UYVY_gles2 =
     "precision mediump float;\n"
     "varying vec2 v_texCoord;\n"
     "uniform sampler2D tex;\n"
@@ -176,7 +176,7 @@ static gchar *text_shader_YUY2_UYVY_gles2 =
  */
 #define text_shader_I420_YV12_gles2 NULL
 
-static gchar *text_shader_AYUV_gles2 =
+static const gchar *text_shader_AYUV_gles2 =
     "precision mediump float;\n"
     "varying vec2 v_texCoord;\n"
     "uniform sampler2D tex;\n"
@@ -195,7 +195,7 @@ static gchar *text_shader_AYUV_gles2 =
     "  gl_FragColor=vec4(1.0,y,u,v);\n"
     "}\n";
 
-static gchar *text_vertex_shader_gles2 =
+static const gchar *text_vertex_shader_gles2 =
     "attribute vec4 a_position;   \n"
     "attribute vec2 a_texCoord;   \n"
     "varying vec2 v_texCoord;     \n"
@@ -205,7 +205,7 @@ static gchar *text_vertex_shader_gles2 =
     "   v_texCoord = a_texCoord;  \n"
     "}                            \n";
 
-static gchar *text_shader_RGB_gles2 =
+static const gchar *text_shader_RGB_gles2 =
     "precision mediump float;                            \n"
     "varying vec2 v_texCoord;                            \n"
     "uniform sampler2D s_texture;                        \n"
diff --git a/gst-libs/gst/gl/gstglupload.c b/gst-libs/gst/gl/gstglupload.c
index 89dbbe3cc2..a4fd222bea 100644
--- a/gst-libs/gst/gl/gstglupload.c
+++ b/gst-libs/gst/gl/gstglupload.c
@@ -79,7 +79,7 @@ static void _do_upload_draw_gles2 (GstGLDisplay * display,
 #if GST_GL_HAVE_OPENGL
 /* YUY2:r,g,a
    UYVY:a,b,r */
-static gchar *text_shader_YUY2_UYVY_opengl =
+static const gchar *text_shader_YUY2_UYVY_opengl =
     "#extension GL_ARB_texture_rectangle : enable\n"
     "uniform sampler2DRect Ytex, UVtex;\n"
     YUV_TO_RGB_COEFFICIENTS
@@ -100,7 +100,7 @@ static gchar *text_shader_YUY2_UYVY_opengl =
 
 /* ATI: "*0.5", ""
    normal: "", "*0.5" */
-static gchar *text_shader_I420_YV12_opengl =
+static const gchar *text_shader_I420_YV12_opengl =
     "#extension GL_ARB_texture_rectangle : enable\n"
     "uniform sampler2DRect Ytex,Utex,Vtex;\n"
     YUV_TO_RGB_COEFFICIENTS
@@ -118,7 +118,7 @@ static gchar *text_shader_I420_YV12_opengl =
     "  gl_FragColor=vec4(r,g,b,1.0);\n"
     "}\n";
 
-static gchar *text_shader_AYUV_opengl =
+static const gchar *text_shader_AYUV_opengl =
     "#extension GL_ARB_texture_rectangle : enable\n"
     "uniform sampler2DRect tex;\n"
     YUV_TO_RGB_COEFFICIENTS
@@ -140,7 +140,7 @@ static gchar *text_shader_AYUV_opengl =
 #if GST_GL_HAVE_GLES2
 /* YUY2:r,g,a
    UYVY:a,b,r */
-static gchar *text_shader_YUY2_UYVY_gles2 =
+static const gchar *text_shader_YUY2_UYVY_gles2 =
     "precision mediump float;\n"
     "varying vec2 v_texCoord;\n"
     "uniform sampler2D Ytex, UVtex;\n"
@@ -160,7 +160,7 @@ static gchar *text_shader_YUY2_UYVY_gles2 =
     "  gl_FragColor = vec4(r, g, b, 1.0);\n"
     "}\n";
 
-static gchar *text_shader_I420_YV12_gles2 =
+static const gchar *text_shader_I420_YV12_gles2 =
     "precision mediump float;\n"
     "varying vec2 v_texCoord;\n"
     "uniform sampler2D Ytex,Utex,Vtex;\n"
@@ -179,7 +179,7 @@ static gchar *text_shader_I420_YV12_gles2 =
     "  gl_FragColor=vec4(r,g,b,1.0);\n"
     "}\n";
 
-static gchar *text_shader_AYUV_gles2 =
+static const gchar *text_shader_AYUV_gles2 =
     "precision mediump float;\n"
     "varying vec2 v_texCoord;\n"
     "uniform sampler2D tex;\n"
@@ -196,7 +196,7 @@ static gchar *text_shader_AYUV_gles2 =
     "  gl_FragColor=vec4(r,g,b,1.0);\n"
     "}\n";
 
-static gchar *text_vertex_shader_gles2 =
+static const gchar *text_vertex_shader_gles2 =
     "attribute vec4 a_position;   \n"
     "attribute vec2 a_texCoord;   \n"
     "varying vec2 v_texCoord;     \n"