diff --git a/src/org/ntlab/deltaViewer/CollaborationLayout.java b/src/org/ntlab/deltaViewer/CollaborationLayout.java
index 30f331b..45ea389 100644
--- a/src/org/ntlab/deltaViewer/CollaborationLayout.java
+++ b/src/org/ntlab/deltaViewer/CollaborationLayout.java
@@ -151,6 +151,26 @@
 						}					
 					}
 				}
+			} else if (a.getAliasType() == AliasType.FORMAL_PARAMETER) {
+				MethodExecution methodExec = a.getOccurrencePoint().getMethodExecution();
+				if (methodExec.isStatic()) {
+					// For calls to a static method.
+					String dstClassName = methodExec.getThisClassName();
+					String srcClassName = methodExec.getCallerMethodExecution().getThisClassName();
+					String dstObjId = methodExec.getThisObjId() + ":" + dstClassName;
+					String srcObjId = null;
+					if (!methodExec.getCallerMethodExecution().isStatic()) {
+						srcObjId = methodExec.getCallerMethodExecution().getThisObjId();
+					} else {
+						srcObjId = methodExec.getCallerMethodExecution().getThisObjId() + ":" + srcClassName;							
+					}
+					Reference r = new Reference(srcObjId, dstObjId, srcClassName, dstClassName);
+					idx = references.indexOf(r);
+					if (idx < 0) {
+						references.add(r);
+						idx = references.indexOf(r);
+					}					
+				}
 			}
 			if (idx >= 0) {
 				Reference r = references.get(idx);