diff --git a/Makefile.cfg b/Makefile.cfg
index 0130a0e..6e70ca1 100644
--- a/Makefile.cfg
+++ b/Makefile.cfg
@@ -100,7 +100,7 @@ ifeq ($(OS),Windows_NT)
 	LIB_NAME_SUFFIX := .dll
 	LIB_NAME_SUFFIX_STATIC := .dll.a
 
-	MODEST_LIBRARY_NAME_WITH_VERSION := lib$(LIB_NAME).$(MODEST_VERSION_MAJOR)$(LIB_NAME_SUFFIX)
+	MODEST_LIBRARY_NAME_WITH_VERSION := lib$(LIB_NAME)-$(MODEST_VERSION_MAJOR)$(LIB_NAME_SUFFIX)
 
 	MODEST_CFLAGS += -Wno-unused-variable -Wno-unused-function --std=c99
     MODEST_LDFLAGS += -Wl,--out-implib,$(call MODEST_LIBRARY_STATIC)