diff --git a/src/main/java/com/orgzly/org/datetime/OrgInterval.java b/src/main/java/com/orgzly/org/datetime/OrgInterval.java
index a50b344..d2f21db 100644
--- a/src/main/java/com/orgzly/org/datetime/OrgInterval.java
+++ b/src/main/java/com/orgzly/org/datetime/OrgInterval.java
@@ -5,7 +5,6 @@
  */
 public class OrgInterval {
     public enum Unit {
-        MINUTE, //  M
         HOUR,   //  h
         DAY,    //  d
         WEEK,   //  w
@@ -55,10 +54,7 @@ public Unit getUnit() {
     }
 
     public void setUnit(String str) {
-        if ("M".equals(str)) {
-            unit = Unit.MINUTE;
-
-        } else if ("h".equals(str)) {
+        if ("h".equals(str)) {
             unit = Unit.HOUR;
 
         } else if ("d".equals(str)) {
@@ -84,8 +80,6 @@ public void setUnit(Unit u) {
 
     public String toString() {
        switch (unit) {
-           case MINUTE:
-               return value + "M";
            case HOUR:
                return value + "h";
            case DAY: