diff --git a/Makefile b/Makefile
index eb30c48..5702ab8 100644
--- a/Makefile
+++ b/Makefile
@@ -1,20 +1,21 @@
 CHICKEN_C = csc
+CSC_FLAGS = -K prefix
 
 MODULES = sexc fmt-c fmt-c-writer semen sex-macros sex-modules sex-reader utils
 OBJ = $(MODULES:%=%.o)
 
 sexc: main.o $(OBJ)
-	$(CHICKEN_C) $^ -o $@
+	$(CHICKEN_C) $(CSC_FLAGS) $^ -o $@
 
 main.o: main.scm
-	$(CHICKEN_C) $< -c -o $@
+	$(CHICKEN_C) $(CSC_FLAGS) $< -c -o $@
 
 %.o: %.scm
-	$(CHICKEN_C) $< -e -c -o $@
+	$(CHICKEN_C) $(CSC_FLAGS) $< -e -c -o $@
 
 sex-tests: $(OBJ) tests/*.scm
-	cd ./tests && $(CHICKEN_C) run.scm -c -o sex-tests.o
-	$(CHICKEN_C) $(OBJ) ./tests/sex-tests.o -o sex-tests
+	cd ./tests && $(CHICKEN_C) $(CSC_FLAGS) run.scm -c -o sex-tests.o
+	$(CHICKEN_C) $(CSC_FLAGS) $(OBJ) ./tests/sex-tests.o -o sex-tests
 
 clean:
 	rm -f $(OBJ) sexc sex-tests main.o ./tests/sex-tests.o