diff --git a/Makefile b/Makefile
index 565a464..9bd8138 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,7 @@ endif
 
 BINARY := psharp
 BUILD_DIR := build
-CFLAGS := $(CFLAGS) -DPH7_LIBRARY_SUFFIX=$(LSUFFIX)
+CFLAGS := $(CFLAGS) -DPH7_LIBRARY_SUFFIX=\"$(LSUFFIX)\"
 
 ENGINE_DIRS := engine/lib engine
 ENGINE_SRCS := $(foreach dir,$(ENGINE_DIRS),$(wildcard $(dir)/*.c))
diff --git a/engine/vm.c b/engine/vm.c
index c0b67d9..e495c56 100644
--- a/engine/vm.c
+++ b/engine/vm.c
@@ -10780,7 +10780,7 @@ static int vm_builtin_import(ph7_context *pCtx, int nArg, ph7_value **apArg) {
 	SyStringInitFromBuf(&pModule.sName, zStr, nLen);
 	unsigned char bfile[255] = {0};
 	unsigned char *file;
-	snprintf(bfile, sizeof(bfile) - 1, "./%s.lib", zStr);
+	snprintf(bfile, sizeof(bfile) - 1, "./%s%s", zStr, PH7_LIBRARY_SUFFIX);
 	file = bfile;
 	SyStringInitFromBuf(&pModule.sFile, file, nLen);
 #ifdef __WINNT__