added -lm
diff --git a/configs/bluegene-osmesa b/configs/bluegene-osmesa
index 427673d..8e5a54b 100644
--- a/configs/bluegene-osmesa
+++ b/configs/bluegene-osmesa
@@ -24,4 +24,4 @@
 # Dependencies
 OSMESA_LIB_DEPS = -lm
 GLU_LIB_DEPS = -L$(TOP)/$(LIB_DIR) -l$(OSMESA_LIB)
-APP_LIB_DEPS = -lOSMesa -lGLU
+APP_LIB_DEPS = -lOSMesa -lGLU -lm