README.md | 2 +-
 nnn.c     | 3 +++

diff --git a/README.md b/README.md
index 0b79ee558026dcfda13d2ec3590d634435a93d97..59fa860bc0c61b14167228fbf863f68dfa19244e 100644
--- a/README.md
+++ b/README.md
@@ -59,7 +59,7 @@     - human-readable file size
     - current item in reverse video
     - number of items in current directory
     - full name of currently selected file
-  - Show details of the currently selected file (stat, file, md5, sha256)
+  - Show details of the currently selected file (stat, file)
   - Directories first
   - Sort numeric names in numeric order
   - Case-insensitive alphabetic content listing instead of upper case first
diff --git a/nnn.c b/nnn.c
index cf43628184c52b012abf7523cfe3446b573a5edd..5256c5d3a4d3fd3bc304a71696d9b1ccdf8a73d4 100644
--- a/nnn.c
+++ b/nnn.c
@@ -796,6 +796,8 @@ 				p++;
 			}
 			printw(" %s", begin);
 		}
+#ifdef SUPPORT_CHKSUM
+		/* Calculating checksums can take VERY long */
 
 		/* Show md5 */
 		sprintf(buf, "openssl md5 \"%s\" 2>&1", fpath);
@@ -822,6 +824,7 @@ 				p++;
 
 			printw("  sha256: %s", p);
 		}
+#endif
 	}
 
 	/* Show exit keys */