diff --git a/configure b/configure
index b995235708..c24cdd4f7e 100755
--- a/configure
+++ b/configure
@@ -4026,6 +4026,10 @@ case $target_os in
         if enabled x86_64; then
             LIBTARGET="i386:x86-64"
         fi
+        if enabled shared; then
+            # Cannot build both shared and static libs when using dllexport.
+            disable static
+        fi
         check_ldflags -Wl,--nxcompat
         check_ldflags -Wl,--dynamicbase
         shlibdir_default="$bindir_default"
@@ -4033,12 +4037,13 @@ case $target_os in
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(NAME)-$(LIBVERSION)$(SLIBSUF)'
         SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(NAME)-$(LIBMAJOR)$(SLIBSUF)'
-        SLIB_EXTRA_CMD=-'sed -e "s/ @[^ ]*//" $$(@:$(SLIBSUF)=.orig.def) > $$(@:$(SLIBSUF)=.def); $(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
+        SLIB_EXTRA_CMD=-'$(DLLTOOL) -m $(LIBTARGET) -d $$(@:$(SLIBSUF)=.def) -l $(SUBDIR)$(SLIBNAME:$(SLIBSUF)=.lib) -D $(SLIBNAME_WITH_MAJOR)'
         SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
         SLIB_INSTALL_LINKS=
         SLIB_INSTALL_EXTRA_SHLIB='$(SLIBNAME:$(SLIBSUF)=.lib)'
         SLIB_INSTALL_EXTRA_LIB='lib$(SLIBNAME:$(SLIBSUF)=.dll.a) $(SLIBNAME_WITH_MAJOR:$(SLIBSUF)=.def)'
-        SHFLAGS='-shared -Wl,--output-def,$$(@:$(SLIBSUF)=.orig.def) -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-runtime-pseudo-reloc -Wl,--enable-auto-image-base'
+        SLIB_CREATE_DEF_CMD='ARCH="$(ARCH)" AR="$(AR_CMD)" NM="$(NM_CMD)" $(SRC_PATH)/compat/windows/makedef $(SUBDIR)lib$(NAME).ver $(OBJS) > $$(@:$(SLIBSUF)=.def)'
+        SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(SLIBNAME:$(SLIBSUF)=.dll.a) -Wl,--enable-auto-image-base $$(@:$(SLIBSUF)=.def)'
         enabled x86_64 && objformat="win64" || objformat="win32"
         dlltool="${cross_prefix}dlltool"
         ranlib=:
@@ -5432,6 +5437,8 @@ DEPX86ASMFLAGS=\$(X86ASMFLAGS)
 AR=$ar
 ARFLAGS=$arflags
 AR_O=$ar_o
+AR_CMD=$ar
+NM_CMD=$nm
 RANLIB=$ranlib
 STRIP=$strip
 LN_S=$ln_s
diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 0efe34f667..da1b2fa7d1 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -285,7 +285,7 @@ int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame);
  */
 AVCPBProperties *ff_add_cpb_side_data(AVCodecContext *avctx);
 
-#if defined(_MSC_VER) && CONFIG_SHARED
+#if defined(_WIN32) && CONFIG_SHARED
 #ifdef BUILDING_avcodec
 #    define av_export_avcodec __declspec(dllexport)
 #else