diff --git a/ffbuild/library.mak b/ffbuild/library.mak
index ed269fdab6..f85ee1ebbf 100644
--- a/ffbuild/library.mak
+++ b/ffbuild/library.mak
@@ -31,6 +31,8 @@ define RULES
 $(TOOLS):     THISLIB = $(FULLNAME:%=$(LD_LIB))
 $(TESTPROGS): THISLIB = $(SUBDIR)$(LIBNAME)
 
+$(LIBOBJS): CPPFLAGS += -DBUILDING_$(NAME)
+
 $(TESTPROGS) $(TOOLS): %$(EXESUF): %.o
 	$$(LD) $(LDFLAGS) $(LDEXEFLAGS) $$(LD_O) $$(filter %.o,$$^) $$(THISLIB) $(FFEXTRALIBS) $$(EXTRALIBS-$$(*F)) $$(ELIBS)
 
diff --git a/libavcodec/ac3tab.h b/libavcodec/ac3tab.h
index f529fc8077..ade6fb15e7 100644
--- a/libavcodec/ac3tab.h
+++ b/libavcodec/ac3tab.h
@@ -26,10 +26,11 @@
 
 #include "libavutil/internal.h"
 #include "ac3.h"
+#include "internal.h"
 
 extern const uint16_t ff_ac3_frame_size_tab[38][3];
 extern const uint8_t  ff_ac3_channels_tab[8];
-extern av_export const uint16_t avpriv_ac3_channel_layout_tab[8];
+extern av_export_avcodec const uint16_t avpriv_ac3_channel_layout_tab[8];
 extern const uint8_t  ff_ac3_enc_channel_map[8][2][6];
 extern const uint8_t  ff_ac3_dec_channel_map[8][2][6];
 extern const uint16_t ff_ac3_sample_rate_tab[3];
diff --git a/libavcodec/dca.h b/libavcodec/dca.h
index dcc7c7b395..e96c589c02 100644
--- a/libavcodec/dca.h
+++ b/libavcodec/dca.h
@@ -29,10 +29,10 @@
 #include <stdint.h>
 
 #include "libavutil/common.h"
-#include "libavutil/internal.h"
 #include "libavutil/intreadwrite.h"
 
 #include "get_bits.h"
+#include "internal.h"
 
 #define DCA_CORE_FRAME_HEADER_SIZE      18
 
@@ -195,7 +195,7 @@ enum DCADownMixType {
     DCA_DMIX_TYPE_COUNT
 };
 
-extern av_export const uint32_t avpriv_dca_sample_rates[16];
+extern av_export_avcodec const uint32_t avpriv_dca_sample_rates[16];
 
 extern const uint32_t ff_dca_sampling_freqs[16];
 extern const uint8_t ff_dca_freq_ranges[16];
diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 948d5461c1..522032b108 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -414,4 +414,14 @@ int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len,
  */
 int64_t ff_guess_coded_bitrate(AVCodecContext *avctx);
 
+#if defined(_MSC_VER) && CONFIG_SHARED
+#ifdef BUILDING_avcodec
+#    define av_export_avcodec __declspec(dllexport)
+#else
+#    define av_export_avcodec __declspec(dllimport)
+#endif
+#else
+#    define av_export_avcodec
+#endif
+
 #endif /* AVCODEC_INTERNAL_H */
diff --git a/libavcodec/jpegtables.h b/libavcodec/jpegtables.h
index 6833b4b166..aa38df4033 100644
--- a/libavcodec/jpegtables.h
+++ b/libavcodec/jpegtables.h
@@ -23,18 +23,18 @@
 
 #include <stdint.h>
 
-#include "libavutil/internal.h"
+#include "internal.h"
 
-extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[];
-extern av_export const uint8_t avpriv_mjpeg_val_dc[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_bits_dc_luminance[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_val_dc[];
 
-extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_bits_dc_chrominance[];
 
-extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[];
-extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_bits_ac_luminance[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_val_ac_luminance[];
 
-extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[];
-extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_bits_ac_chrominance[];
+extern av_export_avcodec const uint8_t avpriv_mjpeg_val_ac_chrominance[];
 
 void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code,
                                   const uint8_t *bits_table,
diff --git a/libavcodec/mpeg4audio.h b/libavcodec/mpeg4audio.h
index 34471782ab..b9cea8af17 100644
--- a/libavcodec/mpeg4audio.h
+++ b/libavcodec/mpeg4audio.h
@@ -27,6 +27,7 @@
 #include "libavutil/attributes.h"
 
 #include "get_bits.h"
+#include "internal.h"
 #include "put_bits.h"
 
 typedef struct MPEG4AudioConfig {
@@ -44,7 +45,7 @@ typedef struct MPEG4AudioConfig {
     int frame_length_short;
 } MPEG4AudioConfig;
 
-extern av_export const int avpriv_mpeg4audio_sample_rates[16];
+extern av_export_avcodec const int avpriv_mpeg4audio_sample_rates[16];
 extern const uint8_t ff_mpeg4audio_channels[8];
 
 /**
diff --git a/libavcodec/mpegaudiodata.h b/libavcodec/mpegaudiodata.h
index 29a26588b2..a188150cbf 100644
--- a/libavcodec/mpegaudiodata.h
+++ b/libavcodec/mpegaudiodata.h
@@ -29,13 +29,13 @@
 
 #include <stdint.h>
 
-#include "libavutil/internal.h"
+#include "internal.h"
 
 #define MODE_EXT_MS_STEREO 2
 #define MODE_EXT_I_STEREO  1
 
-extern av_export const uint16_t avpriv_mpa_bitrate_tab[2][3][15];
-extern av_export const uint16_t avpriv_mpa_freq_tab[3];
+extern av_export_avcodec const uint16_t avpriv_mpa_bitrate_tab[2][3][15];
+extern av_export_avcodec const uint16_t avpriv_mpa_freq_tab[3];
 extern const int ff_mpa_sblimit_table[5];
 extern const int ff_mpa_quant_steps[17];
 extern const int ff_mpa_quant_bits[17];
diff --git a/libavcodec/raw.h b/libavcodec/raw.h
index 24bf4cc55a..28a27b1f9e 100644
--- a/libavcodec/raw.h
+++ b/libavcodec/raw.h
@@ -28,6 +28,7 @@
 #define AVCODEC_RAW_H
 
 #include "avcodec.h"
+#include "internal.h"
 #include "libavutil/internal.h"
 
 typedef struct PixelFormatTag {
@@ -41,7 +42,7 @@ const struct PixelFormatTag *avpriv_get_raw_pix_fmt_tags(void);
 
 enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc);
 
-extern av_export const PixelFormatTag avpriv_pix_fmt_bps_avi[];
-extern av_export const PixelFormatTag avpriv_pix_fmt_bps_mov[];
+extern av_export_avcodec const PixelFormatTag avpriv_pix_fmt_bps_avi[];
+extern av_export_avcodec const PixelFormatTag avpriv_pix_fmt_bps_mov[];
 
 #endif /* AVCODEC_RAW_H */
diff --git a/libavutil/internal.h b/libavutil/internal.h
index 6f92f71e8e..c4bf1466ef 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -64,9 +64,13 @@
 #endif
 
 #if defined(_MSC_VER) && CONFIG_SHARED
-#    define av_export __declspec(dllimport)
+#ifdef BUILDING_avutil
+#    define av_export_avutil __declspec(dllexport)
 #else
-#    define av_export
+#    define av_export_avutil __declspec(dllimport)
+#endif
+#else
+#    define av_export_avutil
 #endif
 
 #if HAVE_PRAGMA_DEPRECATED
diff --git a/libavutil/xga_font_data.h b/libavutil/xga_font_data.h
index 5e40f542e4..69dc337120 100644
--- a/libavutil/xga_font_data.h
+++ b/libavutil/xga_font_data.h
@@ -29,7 +29,7 @@
 #include <stdint.h>
 #include "internal.h"
 
-extern av_export const uint8_t avpriv_cga_font[2048];
-extern av_export const uint8_t avpriv_vga16_font[4096];
+extern av_export_avutil const uint8_t avpriv_cga_font[2048];
+extern av_export_avutil const uint8_t avpriv_vga16_font[4096];
 
 #endif /* AVUTIL_XGA_FONT_DATA_H */