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-rw-r--r--src/mesa/program/prog_statevars.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mesa/program/prog_statevars.c b/src/mesa/program/prog_statevars.c
index bdb335e4ba3..12490d0c380 100644
--- a/src/mesa/program/prog_statevars.c
+++ b/src/mesa/program/prog_statevars.c
@@ -474,7 +474,7 @@ _mesa_fetch_state(struct gl_context *ctx, const gl_state_index state[],
* single MAD.
* linear: fogcoord * -1/(end-start) + end/(end-start)
* exp: 2^-(density/ln(2) * fogcoord)
- * exp2: 2^-((density/(ln(2)^2) * fogcoord)^2)
+ * exp2: 2^-((density/(sqrt(ln(2))) * fogcoord)^2)
*/
value[0] = (ctx->Fog.End == ctx->Fog.Start)
? 1.0f : (GLfloat)(-1.0F / (ctx->Fog.End - ctx->Fog.Start));