diff --git a/src/IMP_visualize_MGMT.R b/src/IMP_visualize_MGMT.R
index 9b2d2f928cea68cfb5753f6ec31b4d7a62cfbd7d..637fd2b1612af88cda11eac4b9e34dbc4763ee3c 100755
--- a/src/IMP_visualize_MGMT.R
+++ b/src/IMP_visualize_MGMT.R
@@ -110,7 +110,7 @@ coding_density=function(total_len_genes, length){
 ## Calculate N50
 get_n50=function(lengths){
     x=lengths
-    x[cumsum(x, na.rm = TRUE) > sum(x)/2][1]
+    x[cumsum(x) > sum(x)/2][1]
 }