diff --git a/src/mapblock_mesh.cpp b/src/mapblock_mesh.cpp
index 658ffe5e..b5962501 100644
--- a/src/mapblock_mesh.cpp
+++ b/src/mapblock_mesh.cpp
@@ -278,9 +278,9 @@ static u8 getSmoothLight(enum LightBank bank, v3s16 p, MeshMakeData *data)
 		//light = (float)light / ((float)ambient_occlusion * 0.5 + 1.0);
 		float light_amount = (8 - ambient_occlusion) / 4.0;
 		float light_f = (float)light / 255.0;
-		light_f = pow(light_f, 2.2); // gamma -> linear space
+		light_f = pow(light_f, 2.2f); // gamma -> linear space
 		light_f = light_f * light_amount;
-		light_f = pow(light_f, 1.0/2.2); // linear -> gamma space
+		light_f = pow(light_f, 1.0f/2.2f); // linear -> gamma space
 		if(light_f > 1.0)
 			light_f = 1.0;
 		light = 255.0 * light_f + 0.5;