diff --git a/crypto_kem/kyber768/clean/Makefile b/crypto_kem/kyber768/clean/Makefile.GNU_make
similarity index 71%
rename from crypto_kem/kyber768/clean/Makefile
rename to crypto_kem/kyber768/clean/Makefile.GNU_make
index e802b821..457d0a83 100644
--- a/crypto_kem/kyber768/clean/Makefile
+++ b/crypto_kem/kyber768/clean/Makefile.GNU_make
@@ -5,9 +5,11 @@ OBJECTS=$(patsubst %.c,%.o,$(SOURCES))
 
 CFLAGS=-Wall -Wextra -Wpedantic -Werror -std=c99 -I../../../common $(EXTRAFLAGS)
 
+all: $(LIB)
+
 $(LIB): $(OBJECTS)
-	$(AR) -r $@ $(OBJECTS)
+    $(AR) -r $@ $(OBJECTS)
 
 clean:
-	$(RM) $(OBJECTS)
-	$(RM) $(LIB)
+    $(RM) $(OBJECTS)
+    $(RM) $(LIB)