--- a/Makefile
+++ b/Makefile
@@ -69,7 +69,7 @@ LIB_NAME = argon2
 PC_NAME = lib$(LIB_NAME).pc
 PC_SRC = $(PC_NAME).in
 
-ifeq ($(KERNEL_NAME), Linux)
+ifeq ($(KERNEL_NAME), $(filter $(KERNEL_NAME),Linux GNU))
 	LIB_EXT := so.$(ABI_VERSION)
 	LIB_CFLAGS := -shared -fPIC -fvisibility=hidden -DA2_VISCTL=1
 	SO_LDFLAGS := -Wl,-soname,lib$(LIB_NAME).$(LIB_EXT)
