diff --git a/build/msvc-common.mk b/build/msvc-common.mk
index 62aababa..94e7b38b 100644
--- a/build/msvc-common.mk
+++ b/build/msvc-common.mk
@@ -41,7 +41,7 @@ SHAREDLIBSUFFIXVER=$(SHAREDLIBSUFFIX)
 SHARED=-LD
 EXTRA_LIBRARY=$(PROJECT_NAME)_dll.lib
 LDFLAGS += -link
-SHLDFLAGS=-debug -opt:ref -opt:icf -def:$(SRC_PATH)openh264.def -implib:$(EXTRA_LIBRARY)
+SHLDFLAGS=-debug -map -opt:ref -opt:icf -def:$(SRC_PATH)openh264.def -implib:$(EXTRA_LIBRARY)
 STATIC_LDFLAGS=
 CODEC_UNITTEST_CFLAGS=-D_CRT_SECURE_NO_WARNINGS