diff --git a/source/dub/dependency.d b/source/dub/dependency.d
index 54df6da..3d332a7 100644
--- a/source/dub/dependency.d
+++ b/source/dub/dependency.d
@@ -135,9 +135,9 @@
 					m_cmpB = "<=";
 				}
 			} else {
-				enforce( ves[idx2+1] == ' ' );
+				assert(ves[idx2] == ' ');
 				m_versA = Version(ves[0..idx2]);
-				string v2 = ves[idx2+2..$];
+				string v2 = ves[idx2+1..$];
 				m_cmpB = skipComp(v2);
 				m_versB = Version(v2);