diff --git a/CMakeLists.txt b/CMakeLists.txt
index bfe7257d7..0a9dd922c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -339,6 +339,8 @@ endif()
 
 if (ENABLE_GUROBI)
     message (STATUS "Linking in Gurobi.")
+	include_directories(${GUROBI_ROOT}/include)
+	link_directories(${GUROBI_ROOT}/lib)
     target_link_libraries(storm "gurobi55")
     target_link_libraries(storm-functional-tests "gurobi55")
     target_link_libraries(storm-performance-tests "gurobi55")
diff --git a/src/adapters/ExplicitModelAdapter.cpp b/src/adapters/ExplicitModelAdapter.cpp
index 5371ebfaa..63dddd452 100644
--- a/src/adapters/ExplicitModelAdapter.cpp
+++ b/src/adapters/ExplicitModelAdapter.cpp
@@ -439,7 +439,7 @@ namespace storm {
                     std::vector<std::list<storm::ir::Command>::const_iterator> iteratorList(activeCommandList.size());
                     
                     // Initialize the list of iterators.
-                    for (int i = 0; i < activeCommandList.size(); ++i) {
+                    for (size_t i = 0; i < activeCommandList.size(); ++i) {
                         iteratorList[i] = activeCommandList[i].cbegin();
                     }
                     
diff --git a/src/settings/ArgumentValidators.h b/src/settings/ArgumentValidators.h
index 4d0ce8170..32084a90c 100644
--- a/src/settings/ArgumentValidators.h
+++ b/src/settings/ArgumentValidators.h
@@ -57,7 +57,6 @@ namespace storm {
 
 			static std::function<bool (std::string const, std::string&)> stringInListValidator(std::vector<std::string> list) {
 				return [list] (std::string const inputString, std::string& errorMessageTarget) -> bool {
-					bool containsElement = false;
 					std::string const lowerInputString = storm::utility::StringHelper::stringToLower(inputString);
 					for (auto it = list.cbegin(); it != list.cend(); ++it) {
 						if (storm::utility::StringHelper::stringToLower(*it).compare(lowerInputString) == 0) {
diff --git a/src/settings/Option.h b/src/settings/Option.h
index 1fabf984a..fd980c923 100644
--- a/src/settings/Option.h
+++ b/src/settings/Option.h
@@ -61,7 +61,7 @@ namespace storm {
 			Option(Option const& other): longName(other.longName), shortName(other.shortName), description(other.description), moduleName(other.moduleName), isRequired(other.isRequired), hasBeenSet(other.hasBeenSet) {
 				// Copy all Arguments
 				this->arguments.reserve(other.arguments.size());
-				for (auto i = 0; i < other.arguments.size(); ++i) {
+				for (size_t i = 0; i < other.arguments.size(); ++i) {
 					// Clone gives a deep copy
 					this->arguments.push_back(std::shared_ptr<ArgumentBase>(other.arguments.at(i).get()->clone()));
 				}
@@ -96,7 +96,7 @@ namespace storm {
 					LOG4CPLUS_ERROR(logger, "Option::unify: Could not unify Option \"" << getLongName() << "\" because the Argument Counts are different!");
 					throw storm::exceptions::OptionUnificationException() << "Could not unify Option \"" << getLongName() << "\" because the Argument Counts are different!";
 				}
-				for(auto i = 0; i != this->arguments.size(); i++) {
+				for(size_t i = 0; i != this->arguments.size(); i++) {
 					ArgumentBase* A = this->arguments.at(i).get();
 					ArgumentBase* B = other.arguments.at(i).get();