diff --git a/code/renderergl2/tr_bsp.c b/code/renderergl2/tr_bsp.c
index a4f47cb8..964a6601 100644
--- a/code/renderergl2/tr_bsp.c
+++ b/code/renderergl2/tr_bsp.c
@@ -286,13 +286,10 @@ static	void R_LoadLightmaps( lump_t *l, lump_t *surfs ) {
 		tr.deluxemaps = ri.Hunk_Alloc( tr.numLightmaps * sizeof(image_t *), h_low );
 	}
 
-	if (r_hdr->integer)
-	{
-		if (glRefConfig.textureFloat && glRefConfig.halfFloatPixel && r_floatLightmap->integer)
-			textureInternalFormat = GL_RGBA16F_ARB;
-		else
-			textureInternalFormat = GL_RGBA8;
-	}
+	if (glRefConfig.floatLightmap)
+		textureInternalFormat = GL_RGBA16F_ARB;
+	else
+		textureInternalFormat = GL_RGBA8;
 
 	if (r_mergeLightmaps->integer)
 	{
@@ -405,12 +402,12 @@ static	void R_LoadLightmaps( lump_t *l, lump_t *surfs ) {
 
 					R_ColorShiftLightingFloats(color, color, 1.0f/255.0f);
 
-					if (glRefConfig.textureFloat && glRefConfig.halfFloatPixel && r_floatLightmap->integer)
+					if (glRefConfig.floatLightmap)
 						ColorToRGBA16F(color, (unsigned short *)(&image[j*8]));
 					else
 						ColorToRGBM(color, &image[j*4]);
 				}
-				else if (glRefConfig.textureFloat && glRefConfig.halfFloatPixel && r_floatLightmap->integer) 
+				else if (glRefConfig.floatLightmap)
 				{
 					vec4_t color;
 
diff --git a/code/renderergl2/tr_extensions.c b/code/renderergl2/tr_extensions.c
index d7e5f1ba..3d653692 100644
--- a/code/renderergl2/tr_extensions.c
+++ b/code/renderergl2/tr_extensions.c
@@ -725,4 +725,7 @@ void GLimp_InitExtraExtensions()
 	{
 		ri.Printf(PRINT_ALL, result[2], extension);
 	}
+
+	// use float lightmaps?
+	glRefConfig.floatLightmap = (glRefConfig.textureFloat && glRefConfig.halfFloatPixel && r_floatLightmap->integer && r_hdr->integer);
 }
diff --git a/code/renderergl2/tr_glsl.c b/code/renderergl2/tr_glsl.c
index 2212c4fe..4919254f 100644
--- a/code/renderergl2/tr_glsl.c
+++ b/code/renderergl2/tr_glsl.c
@@ -903,7 +903,7 @@ void GLSL_InitGPUShaders(void)
 		if (i & GENERICDEF_USE_LIGHTMAP)
 			Q_strcat(extradefines, 1024, "#define USE_LIGHTMAP\n");
 
-		if (r_hdr->integer && !(glRefConfig.textureFloat && glRefConfig.halfFloatPixel && r_floatLightmap->integer))
+		if (r_hdr->integer && !glRefConfig.floatLightmap)
 			Q_strcat(extradefines, 1024, "#define RGBM_LIGHTMAP\n");
 
 		if (!GLSL_InitGPUShader(&tr.genericShader[i], "generic", attribs, qtrue, extradefines, qtrue, fallbackShader_generic_vp, fallbackShader_generic_fp))
@@ -1022,7 +1022,7 @@ void GLSL_InitGPUShaders(void)
 		if (1)
 			Q_strcat(extradefines, 1024, "#define SWIZZLE_NORMALMAP\n");
 
-		if (r_hdr->integer && !(glRefConfig.textureFloat && glRefConfig.halfFloatPixel && r_floatLightmap->integer))
+		if (r_hdr->integer && !glRefConfig.floatLightmap)
 			Q_strcat(extradefines, 1024, "#define RGBM_LIGHTMAP\n");
 
 		if (lightType)
diff --git a/code/renderergl2/tr_local.h b/code/renderergl2/tr_local.h
index 0fbabd20..12fa10ad 100644
--- a/code/renderergl2/tr_local.h
+++ b/code/renderergl2/tr_local.h
@@ -1425,6 +1425,8 @@ typedef struct {
 	qboolean seamlessCubeMap;
 
 	GLenum packedNormalDataType;
+
+	qboolean floatLightmap;
 } glRefConfig_t;