diff --git a/intern/cycles/kernel/kernel_accumulate.h b/intern/cycles/kernel/kernel_accumulate.h
index 3f4cd0c4350..e73b2ba70b8 100644
--- a/intern/cycles/kernel/kernel_accumulate.h
+++ b/intern/cycles/kernel/kernel_accumulate.h
@@ -301,9 +301,13 @@ __device_inline float3 path_radiance_sum(KernelGlobals *kg, PathRadiance *L)
 
 __device_inline void path_radiance_clamp(PathRadiance *L, float3 *L_sum, float clamp)
 {
+	#ifdef WITH_OSL
+	using std::isfinite;
+	#endif
+
 	float sum = fabsf((*L_sum).x) + fabsf((*L_sum).y) + fabsf((*L_sum).z);
 
-	if(!std::isfinite(sum)) {
+	if(!isfinite(sum)) {
 		/* invalid value, reject */
 		*L_sum = make_float3(0.0f, 0.0f, 0.0f);