diff --git a/configure.ac b/configure.ac
index 5031a1dd..65e4fbd8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -105,8 +105,6 @@ AC_ARG_ENABLE(fixed-point, [  --enable-fixed-point    compile as fixed-point],
 [if test "$enableval" = yes; then
   ac_enable_fixed="yes";
   AC_DEFINE([FIXED_POINT], , [Compile as fixed-point])
-  AC_DEFINE([DOUBLE_PRECISION], , [Compile as fixed-point])
-  AC_DEFINE([MIXED_PRECISION], , [Compile as fixed-point])
 else
   AC_DEFINE([FLOATING_POINT], , [Compile as floating-point])
 fi],
diff --git a/libcelt/_kiss_fft_guts.h b/libcelt/_kiss_fft_guts.h
index a3ec8544..f68e7fb5 100644
--- a/libcelt/_kiss_fft_guts.h
+++ b/libcelt/_kiss_fft_guts.h
@@ -53,18 +53,15 @@ struct kiss_fft_state{
 #ifdef FIXED_POINT
 #include "arch.h"
 
+#define DOUBLE_PRECISION
+
 #ifdef DOUBLE_PRECISION
 
 # define FRACBITS 31
 # define SAMPPROD long long
 #define SAMP_MAX 2147483647
-#ifdef MIXED_PRECISION
 #define TWID_MAX 32767
 #define TRIG_UPSCALE 1
-#else
-#define TRIG_UPSCALE 65536
-#define TWID_MAX 2147483647
-#endif
 #define EXT32(a) (a)
 
 #else /* DOUBLE_PRECISION */
@@ -88,7 +85,6 @@ struct kiss_fft_state{
 #   define smul(a,b) ( (SAMPPROD)(a)*(b) )
 #   define sround( x )  (kiss_fft_scalar)( ( (x) + ((SAMPPROD)1<<(FRACBITS-1)) ) >> FRACBITS )
 
-#ifdef MIXED_PRECISION
 
 #   define S_MUL(a,b) MULT16_32_Q15(b, a)
 
@@ -129,34 +125,6 @@ struct kiss_fft_state{
     do {(res).r = ADD32((res).r,(a).r);  (res).i = SUB32((res).i,(a).i); \
     }while(0)
 
-#else /* MIXED_PRECISION */
-#   define sround4( x )  (kiss_fft_scalar)( ( (x) + ((SAMPPROD)1<<(FRACBITS-1)) ) >> (FRACBITS+2) )
-
-#   define S_MUL(a,b) sround( smul(a,b) )
-
-#   define C_MUL(m,a,b) \
-      do{ (m).r = sround( smul((a).r,(b).r) - smul((a).i,(b).i) ); \
-          (m).i = sround( smul((a).r,(b).i) + smul((a).i,(b).r) ); }while(0)
-#   define C_MULC(m,a,b) \
-      do{ (m).r = sround( smul((a).r,(b).r) + smul((a).i,(b).i) ); \
-          (m).i = sround( smul((a).i,(b).r) - smul((a).r,(b).i) ); }while(0)
-
-#   define C_MUL4(m,a,b) \
-               do{ (m).r = sround4( smul((a).r,(b).r) - smul((a).i,(b).i) ); \
-               (m).i = sround4( smul((a).r,(b).i) + smul((a).i,(b).r) ); }while(0)
-
-#   define C_MULBYSCALAR( c, s ) \
-               do{ (c).r =  sround( smul( (c).r , s ) ) ;\
-               (c).i =  sround( smul( (c).i , s ) ) ; }while(0)
-
-#   define DIVSCALAR(x,k) \
-	(x) = sround( smul(  x, SAMP_MAX/k ) )
-
-#   define C_FIXDIV(c,div) \
-	do {    DIVSCALAR( (c).r , div);  \
-		DIVSCALAR( (c).i  , div); }while (0)
-
-#endif /* !MIXED_PRECISION */
 
 
 
diff --git a/libcelt/kiss_fft.c b/libcelt/kiss_fft.c
index 82f918a3..e0960f7c 100644
--- a/libcelt/kiss_fft.c
+++ b/libcelt/kiss_fft.c
@@ -569,7 +569,7 @@ int kf_factor(int n,int * facbuf)
 static void compute_twiddles(kiss_twiddle_cpx *twiddles, int nfft)
 {
    int i;
-#if defined(FIXED_POINT) && (!defined(DOUBLE_PRECISION) || defined(MIXED_PRECISION))
+#ifdef FIXED_POINT
    for (i=0;i<nfft;++i) {
       celt_word32 phase = -i;
       kf_cexp2(twiddles+i, DIV32(SHL32(phase,17),nfft));
diff --git a/libcelt/kiss_fft.h b/libcelt/kiss_fft.h
index eff6cb1e..12e6d15d 100644
--- a/libcelt/kiss_fft.h
+++ b/libcelt/kiss_fft.h
@@ -51,6 +51,8 @@ extern "C" {
 
 #ifdef FIXED_POINT
 #include "arch.h"	
+#define DOUBLE_PRECISION
+
 #ifdef DOUBLE_PRECISION
 #  define kiss_fft_scalar celt_int32
 #  define kiss_twiddle_scalar celt_int32
diff --git a/libcelt/mdct.c b/libcelt/mdct.c
index 7a48eac1..0117c40f 100644
--- a/libcelt/mdct.c
+++ b/libcelt/mdct.c
@@ -83,13 +83,8 @@ void clt_mdct_init(mdct_lookup *l,int N, int maxshift)
      return;
    /* We have enough points that sine isn't necessary */
 #if defined(FIXED_POINT)
-#if defined(DOUBLE_PRECISION) & !defined(MIXED_PRECISION)
-   for (i=0;i<=N4;i++)
-      l->trig[i] = SAMP_MAX*cos(2*M_PI*i/N);
-#else
    for (i=0;i<=N4;i++)
       l->trig[i] = TRIG_UPSCALE*celt_cos_norm(DIV32(ADD32(SHL32(EXTEND32(i),17),N2),N));
-#endif
 #else
    for (i=0;i<=N4;i++)
       l->trig[i] = cos(2*M_PI*i/N);