--- a/media/libvpx/config/win/ia32/vpx_config.asm
+++ b/media/libvpx/config/win/ia32/vpx_config.asm
@@ -12,17 +12,17 @@
 %define HAVE_SSE 1
 %define HAVE_SSE2 1
 %define HAVE_SSE3 1
 %define HAVE_SSSE3 1
 %define HAVE_SSE4_1 1
 %define HAVE_AVX 1
 %define HAVE_AVX2 1
 %define HAVE_VPX_PORTS 1
-%define HAVE_PTHREAD_H 0
+%define HAVE_PTHREAD_H 1
 %define CONFIG_DEPENDENCY_TRACKING 1
 %define CONFIG_EXTERNAL_BUILD 1
 %define CONFIG_INSTALL_DOCS 0
 %define CONFIG_INSTALL_BINS 1
 %define CONFIG_INSTALL_LIBS 1
 %define CONFIG_INSTALL_SRCS 0
 %define CONFIG_DEBUG 0
 %define CONFIG_GPROF 0

--- a/media/libvpx/config/win/ia32/vpx_config.h
+++ b/media/libvpx/config/win/ia32/vpx_config.h
@@ -24,17 +24,17 @@
 #define HAVE_SSE 1
 #define HAVE_SSE2 1
 #define HAVE_SSE3 1
 #define HAVE_SSSE3 1
 #define HAVE_SSE4_1 1
 #define HAVE_AVX 1
 #define HAVE_AVX2 1
 #define HAVE_VPX_PORTS 1
-#define HAVE_PTHREAD_H 0
+#define HAVE_PTHREAD_H 1
 #define CONFIG_DEPENDENCY_TRACKING 1
 #define CONFIG_EXTERNAL_BUILD 1
 #define CONFIG_INSTALL_DOCS 0
 #define CONFIG_INSTALL_BINS 1
 #define CONFIG_INSTALL_LIBS 1
 #define CONFIG_INSTALL_SRCS 0
 #define CONFIG_DEBUG 0
 #define CONFIG_GPROF 0