diff --git a/prism/src/pepa/compiler/Makefile b/prism/src/pepa/compiler/Makefile
index 7b05b878..57a6e69b 100644
--- a/prism/src/pepa/compiler/Makefile
+++ b/prism/src/pepa/compiler/Makefile
@@ -32,7 +32,7 @@ checks:
 	fi; 
 
 $(PRISM_DIR_REL)/$(CLASSES_DIR)/$(THIS_DIR)/%.class: %.java
-	(cd ..; $(JAVAC) -sourcepath $(THIS_DIR)/$(PRISM_DIR_REL)/$(SRC_DIR) -classpath $(PRISM_CLASSPATH) -h $(JNI_GEN_HEADER_DIR) -d $(THIS_DIR)/$(PRISM_DIR_REL)/$(CLASSES_DIR) $(THIS_DIR)/$<)
+	(cd ../..; $(JAVAC) -sourcepath $(THIS_DIR)/$(PRISM_DIR_REL)/$(SRC_DIR) -classpath $(PRISM_CLASSPATH) -h $(JNI_GEN_HEADER_DIR) -d $(THIS_DIR)/$(PRISM_DIR_REL)/$(CLASSES_DIR) $(THIS_DIR)/$<)
 
 clean: checks
 	@rm -f $(CLASS_FILES)