diff --git a/web/src/main/java/org/phoenixctms/ctsms/web/conversion/DurationConverterBase.java b/web/src/main/java/org/phoenixctms/ctsms/web/conversion/DurationConverterBase.java
index eae4ce36e610..9ce7f96a9901 100644
--- a/web/src/main/java/org/phoenixctms/ctsms/web/conversion/DurationConverterBase.java
+++ b/web/src/main/java/org/phoenixctms/ctsms/web/conversion/DurationConverterBase.java
@@ -11,6 +11,8 @@
 
 public abstract class DurationConverterBase implements Converter {
 
+	protected abstract boolean isSigned();
+
 	@Override
 	public String getAsString(FacesContext facesContext, UIComponent component, Object value) {
 		if (value == null) {
@@ -27,7 +29,8 @@ public String getAsString(FacesContext facesContext, UIComponent component, Obje
 				}
 			}
 		} else if (value instanceof SelectItem) {
-			return DateUtil.getDurationString((Integer) ((SelectItem) value).getValue(), DurationUnitOfTime.SECONDS, DurationUnitOfTime.SECONDS, 0);
+			Integer seconds = (Integer) ((SelectItem) value).getValue();
+			return (isSigned() ? DateUtil.getSignSymbol(seconds) : "") + DateUtil.getDurationString(seconds, DurationUnitOfTime.SECONDS, DurationUnitOfTime.SECONDS, 0);
 		} else {
 			return CommonUtil.NO_SELECTION_VALUE;
 		}
diff --git a/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleDurationConverter.java b/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleDurationConverter.java
index 71c8ae255b9c..d456e257a7cb 100644
--- a/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleDurationConverter.java
+++ b/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleDurationConverter.java
@@ -30,4 +30,9 @@ public Object getAsObject(FacesContext context, UIComponent component, String va
 			return null;
 		}
 	}
+
+	@Override
+	protected boolean isSigned() {
+		return false;
+	}
 }
diff --git a/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleOffsetConverter.java b/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleOffsetConverter.java
index 0d8d7dd7a0fd..229b2f069b88 100644
--- a/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleOffsetConverter.java
+++ b/web/src/main/java/org/phoenixctms/ctsms/web/conversion/VisitScheduleOffsetConverter.java
@@ -30,4 +30,9 @@ public Object getAsObject(FacesContext context, UIComponent component, String va
 			return null;
 		}
 	}
+
+	@Override
+	protected boolean isSigned() {
+		return true;
+	}
 }