diff --git a/headers/os/package/solver/Solver.h b/headers/os/package/solver/Solver.h
index c283b3e993..90c0045281 100644
--- a/headers/os/package/solver/Solver.h
+++ b/headers/os/package/solver/Solver.h
@@ -14,6 +14,7 @@ namespace BPackageKit {
 
 
 class BSolverPackage;
+class BSolverPackageSpecifier;
 class BSolverPackageSpecifierList;
 class BSolverProblem;
 class BSolverRepository;
@@ -47,7 +48,9 @@ public:
 
 	virtual	status_t			Install(
 									const BSolverPackageSpecifierList&
-										packages) = 0;
+										packages,
+									const BSolverPackageSpecifier** _unmatched
+										= NULL) = 0;
 	virtual	status_t			VerifyInstallation() = 0;
 
 			bool				HasProblems() const
diff --git a/src/kits/package/solver/LibsolvSolver.cpp b/src/kits/package/solver/LibsolvSolver.cpp
index d6a0935856..460befd544 100644
--- a/src/kits/package/solver/LibsolvSolver.cpp
+++ b/src/kits/package/solver/LibsolvSolver.cpp
@@ -284,8 +284,12 @@ LibsolvSolver::FindPackages(const char* searchString, uint32 flags,
 
 
 status_t
-LibsolvSolver::Install(const BSolverPackageSpecifierList& packages)
+LibsolvSolver::Install(const BSolverPackageSpecifierList& packages,
+	const BSolverPackageSpecifier** _unmatched)
 {
+	if (_unmatched != NULL)
+		*_unmatched = NULL;
+
 	if (packages.IsEmpty())
 		return B_BAD_VALUE;
 
@@ -327,8 +331,11 @@ LibsolvSolver::Install(const BSolverPackageSpecifierList& packages)
 					| SELECTION_CANON | SELECTION_DOTARCH | SELECTION_REL;
 				/*int matchFlags =*/ selection_make(fPool, &matchingPackages,
 					specifier.SelectString().String(), flags);
-				if (matchingPackages.count == 0)
+				if (matchingPackages.count == 0) {
+					if (_unmatched != NULL)
+						*_unmatched = &specifier;
 					return B_NAME_NOT_FOUND;
+				}
 // TODO: We might want to add support for restricting to certain repositories.
 #if 0		
 				// restrict to the matching repository
diff --git a/src/kits/package/solver/LibsolvSolver.h b/src/kits/package/solver/LibsolvSolver.h
index 48f76f83fb..09c6dbacfc 100644
--- a/src/kits/package/solver/LibsolvSolver.h
+++ b/src/kits/package/solver/LibsolvSolver.h
@@ -40,7 +40,9 @@ public:
 
 	virtual	status_t			Install(
 									const BSolverPackageSpecifierList&
-										packages);
+										packages,
+									const BSolverPackageSpecifier** _unmatched
+										= NULL);
 	virtual	status_t			VerifyInstallation();
 
 	virtual	int32				CountProblems() const;