diff --git a/audio/audio_filters/fft/fft.h b/audio/audio_filters/fft/fft.h
index 4952e8e04a..64df4cc042 100644
--- a/audio/audio_filters/fft/fft.h
+++ b/audio/audio_filters/fft/fft.h
@@ -17,61 +17,10 @@
 #define RARCH_FFT_H__
 
 #include <retro_inline.h>
+#include <math/complex.h>
 
 typedef struct fft fft_t;
 
-// C99 <complex.h> would be nice.
-typedef struct
-{
-   float real;
-   float imag;
-} fft_complex_t;
-
-static INLINE fft_complex_t fft_complex_mul(fft_complex_t a,
-      fft_complex_t b)
-{
-   fft_complex_t out = {
-      a.real * b.real - a.imag * b.imag,
-      a.imag * b.real + a.real * b.imag,
-   };
-
-   return out;
-
-}
-
-static INLINE fft_complex_t fft_complex_add(fft_complex_t a,
-      fft_complex_t b)
-{
-   fft_complex_t out = {
-      a.real + b.real,
-      a.imag + b.imag,
-   };
-
-   return out;
-
-}
-
-static INLINE fft_complex_t fft_complex_sub(fft_complex_t a,
-      fft_complex_t b)
-{
-   fft_complex_t out = {
-      a.real - b.real,
-      a.imag - b.imag,
-   };
-
-   return out;
-
-}
-
-static INLINE fft_complex_t fft_complex_conj(fft_complex_t a)
-{
-   fft_complex_t out = {
-      a.real, -a.imag,
-   };
-
-   return out;
-}
-
 fft_t *fft_new(unsigned block_size_log2);
 
 void fft_free(fft_t *fft);
diff --git a/libretro-common/include/math/complex.h b/libretro-common/include/math/complex.h
new file mode 100644
index 0000000000..3b26d1c8e0
--- /dev/null
+++ b/libretro-common/include/math/complex.h
@@ -0,0 +1,80 @@
+/* Copyright  (C) 2010-2016 The RetroArch team
+ *
+ * ---------------------------------------------------------------------------------------
+ * The following license statement only applies to this file (fxp.h).
+ * ---------------------------------------------------------------------------------------
+ *
+ * Permission is hereby granted, free of charge,
+ * to any person obtaining a copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __LIBRETRO_SDK_MATH_COMPLEX_H__
+#define __LIBRETRO_SDK_MATH_COMPLEX_H__
+
+#include <stdint.h>
+
+#include <retro_inline.h>
+
+typedef struct
+{
+   float real;
+   float imag;
+} fft_complex_t;
+
+static INLINE fft_complex_t fft_complex_mul(fft_complex_t a,
+      fft_complex_t b)
+{
+   fft_complex_t out = {
+      a.real * b.real - a.imag * b.imag,
+      a.imag * b.real + a.real * b.imag,
+   };
+
+   return out;
+
+}
+
+static INLINE fft_complex_t fft_complex_add(fft_complex_t a,
+      fft_complex_t b)
+{
+   fft_complex_t out = {
+      a.real + b.real,
+      a.imag + b.imag,
+   };
+
+   return out;
+
+}
+
+static INLINE fft_complex_t fft_complex_sub(fft_complex_t a,
+      fft_complex_t b)
+{
+   fft_complex_t out = {
+      a.real - b.real,
+      a.imag - b.imag,
+   };
+
+   return out;
+
+}
+
+static INLINE fft_complex_t fft_complex_conj(fft_complex_t a)
+{
+   fft_complex_t out = {
+      a.real, -a.imag,
+   };
+
+   return out;
+}
+
+#endif