diff --git a/libavcodec/arm/mathops.h b/libavcodec/arm/mathops.h
index 2da9c1cab3..2244fa19ae 100644
--- a/libavcodec/arm/mathops.h
+++ b/libavcodec/arm/mathops.h
@@ -23,6 +23,7 @@
 #define AVCODEC_ARM_MATHOPS_H
 
 #include <stdint.h>
+#include "config.h"
 #include "libavutil/common.h"
 
 #if HAVE_INLINE_ASM
diff --git a/libavcodec/avr32/mathops.h b/libavcodec/avr32/mathops.h
index f39aa8800f..85f42b594d 100644
--- a/libavcodec/avr32/mathops.h
+++ b/libavcodec/avr32/mathops.h
@@ -23,6 +23,7 @@
 #define AVCODEC_AVR32_MATHOPS_H
 
 #include <stdint.h>
+#include "config.h"
 #include "libavutil/common.h"
 
 #if HAVE_INLINE_ASM
diff --git a/libavcodec/bfin/mathops.h b/libavcodec/bfin/mathops.h
index 2ed2dc9022..a0e808c81a 100644
--- a/libavcodec/bfin/mathops.h
+++ b/libavcodec/bfin/mathops.h
@@ -22,6 +22,8 @@
 #ifndef AVCODEC_BFIN_MATHOPS_H
 #define AVCODEC_BFIN_MATHOPS_H
 
+#include "config.h"
+
 #if CONFIG_MPEGAUDIO_HP
 #define MULH(X,Y) ({ int xxo;                           \
     __asm__ (                                               \
diff --git a/libavcodec/mips/mathops.h b/libavcodec/mips/mathops.h
index b281e5f776..a1b04ed951 100644
--- a/libavcodec/mips/mathops.h
+++ b/libavcodec/mips/mathops.h
@@ -22,6 +22,7 @@
 #define AVCODEC_MIPS_MATHOPS_H
 
 #include <stdint.h>
+#include "config.h"
 #include "libavutil/common.h"
 
 #if HAVE_LOONGSON
diff --git a/libavcodec/ppc/mathops.h b/libavcodec/ppc/mathops.h
index 51311fa132..dbd714fcd4 100644
--- a/libavcodec/ppc/mathops.h
+++ b/libavcodec/ppc/mathops.h
@@ -24,6 +24,7 @@
 #define AVCODEC_PPC_MATHOPS_H
 
 #include <stdint.h>
+#include "config.h"
 #include "libavutil/common.h"
 
 #if HAVE_PPC4XX