diff --git a/Makefile b/Makefile
index ea289ea13..c6a738c3f 100644
--- a/Makefile
+++ b/Makefile
@@ -687,7 +687,8 @@ endif
 
 ifeq ($(ENABLE_SLANG),1)
 OBJS += yosys-slang/build/*.o
-OBJS += yosys-slang/build/slang_install/lib*/*.a
+OBJS += yosys-slang/build/slang_install/lib/*.a
+OBJS += yosys-slang/build/slang_install/lib64/*.a
 endif
 
 ifneq ($(SMALL),1)