diff --git a/prism/Makefile b/prism/Makefile
index 04015170..7d0a955e 100644
--- a/prism/Makefile
+++ b/prism/Makefile
@@ -269,7 +269,7 @@ JAVA_INCLUDES = -I $(JAVA_JNI_H_DIR) -I $(JAVA_JNI_MD_H_DIR)
 # Main part of Makefile #
 #########################
 
-MAKE_DIRS = dd jdd odd dv prism mtbdd sparse hybrid parser settings userinterface pepa/compiler simulator jltl2ba jltl2dstar explicit pta param
+MAKE_DIRS = dd jdd odd dv prism mtbdd sparse hybrid parser settings userinterface pepa/compiler simulator jltl2ba jltl2dstar explicit pta param strat
 
 EXT_PACKAGES = lpsolve55 lp_solve_5.5_java
 
@@ -534,6 +534,10 @@ clean_explicit: checks
 	@(cd src/explicit && $(MAKE) -s SRC_DIR="$(SRC_DIR)" CLASSES_DIR="$(CLASSES_DIR)" OBJ_DIR="$(OBJ_DIR)" LIB_DIR="$(LIB_DIR)" EXE="$(EXE)" LIBPREFIX="$(LIBPREFIX)" LIBSUFFIX="$(LIBSUFFIX)" clean)
 clean_pta: checks
 	@(cd src/pta && $(MAKE) -s SRC_DIR="$(SRC_DIR)" CLASSES_DIR="$(CLASSES_DIR)" OBJ_DIR="$(OBJ_DIR)" LIB_DIR="$(LIB_DIR)" EXE="$(EXE)" LIBPREFIX="$(LIBPREFIX)" LIBSUFFIX="$(LIBSUFFIX)" clean)
+clean_param: checks
+	@(cd src/param && $(MAKE) -s SRC_DIR="$(SRC_DIR)" CLASSES_DIR="$(CLASSES_DIR)" OBJ_DIR="$(OBJ_DIR)" LIB_DIR="$(LIB_DIR)" EXE="$(EXE)" LIBPREFIX="$(LIBPREFIX)" LIBSUFFIX="$(LIBSUFFIX)" clean)
+clean_strat: checks
+	@(cd src/strat && $(MAKE) -s SRC_DIR="$(SRC_DIR)" CLASSES_DIR="$(CLASSES_DIR)" OBJ_DIR="$(OBJ_DIR)" LIB_DIR="$(LIB_DIR)" EXE="$(EXE)" LIBPREFIX="$(LIBPREFIX)" LIBSUFFIX="$(LIBSUFFIX)" clean)
 
 checks:
 	@(if [ "$(OSTYPE)" != "linux" -a "$(OSTYPE)" != "solaris" -a "$(OSTYPE)" != "cygwin" -a "$(OSTYPE)" != "darwin" ]; then \