Index: trunk/src/engine/particle_engine.cc
===================================================================
--- trunk/src/engine/particle_engine.cc	(revision 452)
+++ trunk/src/engine/particle_engine.cc	(revision 453)
@@ -749,5 +749,5 @@
 					if ( edata.angle > 0.0f )
 					{
-						float emission_angle = glm::radians( edata.angle );
+						float emission_angle = math::radians( edata.angle );
 						float cos_theta = r.frange( math::cos( emission_angle ), 1.0f );
 						float sin_theta = math::sqrt(1.0f - cos_theta * cos_theta );