diff --git a/dlls/wined3d/baseshader.c b/dlls/wined3d/baseshader.c
index 7771b796dee..36cb6047f41 100644
--- a/dlls/wined3d/baseshader.c
+++ b/dlls/wined3d/baseshader.c
@@ -725,7 +725,10 @@ void shader_generate_glsl_declarations(
     char pshader = shader_is_pshader_version(This->baseShader.hex_version);
 
     /* Declare the constants (aka uniforms) */
-    shader_addline(buffer, "uniform vec4 C[%u];\n", This->baseShader.limits.constant_float);
+    if (pshader)
+        shader_addline(buffer, "uniform vec4 PC[%u];\n", This->baseShader.limits.constant_float);
+    else
+        shader_addline(buffer, "uniform vec4 VC[%u];\n", This->baseShader.limits.constant_float);
 
     /* Declare texture samplers */ 
     for (i = 0; i < This->baseShader.limits.sampler; i++) {
diff --git a/dlls/wined3d/drawprim.c b/dlls/wined3d/drawprim.c
index a4715e712f0..08afebe0761 100644
--- a/dlls/wined3d/drawprim.c
+++ b/dlls/wined3d/drawprim.c
@@ -1723,7 +1723,8 @@ void drawPrimLoadPSamplersGLSL(
 void drawPrimLoadConstantsGLSL_F(IWineD3DDevice* iface,
                                  unsigned max_constants,
                                  float* constants,
-                                 BOOL* constants_set) {
+                                 BOOL* constants_set,
+                                 char is_pshader) {
     
     IWineD3DDeviceImpl* This = (IWineD3DDeviceImpl *)iface;
     GLhandleARB programId = This->stateBlock->shaderPrgId;
@@ -1738,12 +1739,15 @@ void drawPrimLoadConstantsGLSL_F(IWineD3DDevice* iface,
     
     for (i=0; i<max_constants; ++i) {
         if (NULL == constants_set || constants_set[i]) {
+
+            const char* prefix = is_pshader? "PC":"VC";
+
             TRACE_(d3d_shader)("Loading constants %i: %f, %f, %f, %f\n",
                    i, constants[i*4], constants[i*4+1], constants[i*4+2], constants[i*4+3]);
 
             /* TODO: Benchmark and see if it would be beneficial to store the 
              * locations of the constants to avoid looking up each time */
-            snprintf(tmp_name, sizeof(tmp_name), "C[%i]", i);
+            snprintf(tmp_name, sizeof(tmp_name), "%s[%i]", prefix, i);
             tmp_loc = GL_EXTCALL(glGetUniformLocationARB(programId, tmp_name));
             if (tmp_loc != -1) {
                 /* We found this uniform name in the program - go ahead and send the data */
@@ -1798,13 +1802,13 @@ void drawPrimLoadConstants(IWineD3DDevice *iface,
             if (NULL != vertexDeclaration && NULL != vertexDeclaration->constants) {
                 /* Load DirectX 8 float constants/uniforms for vertex shader */
                 drawPrimLoadConstantsGLSL_F(iface, WINED3D_VSHADER_MAX_CONSTANTS,
-                                            vertexDeclaration->constants, NULL);
+                                            vertexDeclaration->constants, NULL, 0);
             }
 
             /* Load DirectX 9 float constants/uniforms for vertex shader */
             drawPrimLoadConstantsGLSL_F(iface, WINED3D_VSHADER_MAX_CONSTANTS,
                                         This->stateBlock->vertexShaderConstantF, 
-                                        This->stateBlock->set.vertexShaderConstantsF);
+                                        This->stateBlock->set.vertexShaderConstantsF, 0);
 
             /* TODO: Load boolean & integer constants for vertex shader */
         }
@@ -1816,7 +1820,7 @@ void drawPrimLoadConstants(IWineD3DDevice *iface,
             /* Load DirectX 9 float constants/uniforms for pixel shader */
             drawPrimLoadConstantsGLSL_F(iface, WINED3D_PSHADER_MAX_CONSTANTS,
                                         This->stateBlock->pixelShaderConstantF,
-                                        This->stateBlock->set.pixelShaderConstantsF);
+                                        This->stateBlock->set.pixelShaderConstantsF, 1);
 
             /* TODO: Load boolean & integer constants for pixel shader */
         }
diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index 32b7f9c65a7..3661d06578e 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -205,6 +205,9 @@ static void shader_glsl_get_register_name(
         } 
         break;
     case D3DSPR_CONST:
+    {
+        const char* prefix = pshader? "PC":"VC";
+
         if (arg->reg_maps->constantsF[reg]) {
             /* Use a local constant declared by "dcl" */
             
@@ -214,7 +217,7 @@ static void shader_glsl_get_register_name(
                   * local constant. */
                 FIXME("Relative addressing not yet supported on named constants\n");
             } else {
-                sprintf(tmpStr, "C%lu", reg);
+                sprintf(tmpStr, "%s%lu", prefix, reg);
             }
         } else {
             /* Use a global constant declared in Set____ShaderConstantF() */
@@ -224,16 +227,17 @@ static void shader_glsl_get_register_name(
                 if (D3DSHADER_VERSION_MAJOR(This->baseShader.hex_version) >= 2)  {
                     char relStr[100], relReg[50], relMask[6];
                     shader_glsl_add_param(arg, addr_token, 0, TRUE, relReg, relMask, relStr);
-                    sprintf(tmpStr, "C[%s + %lu]", relStr, reg);
+                    sprintf(tmpStr, "%s[%s + %lu]", prefix, relStr, reg);
                 } else {
-                    sprintf(tmpStr, "C[A0.x + %lu]", reg);
+                    sprintf(tmpStr, "%s[A0.x + %lu]", prefix, reg);
                 }
             } else {
                 /* Just a normal global constant - no relative addressing */
-                sprintf(tmpStr, "C[%lu]", reg);
+                sprintf(tmpStr, "%s[%lu]", prefix, reg);
             }
         }
-    break;
+        break;
+    }
     case D3DSPR_TEXTURE: /* case D3DSPR_ADDR: */
         if (pshader) {
             sprintf(tmpStr, "T%lu", reg);
@@ -710,8 +714,12 @@ void shader_glsl_def(SHADER_OPCODE_ARG* arg) {
 
     DWORD reg = arg->dst & D3DSP_REGNUM_MASK;
 
+    IWineD3DBaseShaderImpl* This = (IWineD3DBaseShaderImpl*) arg->shader;
+    char pshader = shader_is_pshader_version(This->baseShader.hex_version);
+    const char* prefix = pshader? "PC":"VC";
+
     shader_addline(arg->buffer, 
-                   "const vec4 C%lu = { %f, %f, %f, %f };\n", reg,
+                   "const vec4 %s%lu = { %f, %f, %f, %f };\n", prefix, reg,
                    *((const float *)(arg->src + 0)),
                    *((const float *)(arg->src + 1)),
                    *((const float *)(arg->src + 2)),