diff --git a/stim/envi/envi.h b/stim/envi/envi.h
index 9de6869..2552943 100644
--- a/stim/envi/envi.h
+++ b/stim/envi/envi.h
@@ -1453,6 +1453,7 @@ public:
 				exit(1);
 			}
 		}
+		free(temp);
 	}
 
 	/// Retrieve a spectrum from the specified (x, y) location
--
libgit2 0.21.4