diff --git a/libavcodec/mpegaudiodec.c b/libavcodec/mpegaudiodec.c
index e5a1acecb0..f3ed155ab9 100644
--- a/libavcodec/mpegaudiodec.c
+++ b/libavcodec/mpegaudiodec.c
@@ -73,8 +73,7 @@
 #    include "dct32.c"
 #endif
 
-static void compute_antialias_integer(MPADecodeContext *s, GranuleDef *g);
-static void compute_antialias_float(MPADecodeContext *s, GranuleDef *g);
+static void compute_antialias(MPADecodeContext *s, GranuleDef *g);
 static void apply_window_mp3_c(MPA_INT *synth_buf, MPA_INT *window,
                                int *dither_state, OUT_INT *samples, int incr);
 
@@ -1575,6 +1574,7 @@ static void compute_stereo(MPADecodeContext *s,
     }
 }
 
+#if !CONFIG_FLOAT
 static void compute_antialias_integer(MPADecodeContext *s,
                               GranuleDef *g)
 {
@@ -1614,45 +1614,7 @@ static void compute_antialias_integer(MPADecodeContext *s,
         ptr += 18;
     }
 }
-
-static void compute_antialias_float(MPADecodeContext *s,
-                              GranuleDef *g)
-{
-    float *ptr;
-    int n, i;
-
-    /* we antialias only "long" bands */
-    if (g->block_type == 2) {
-        if (!g->switch_point)
-            return;
-        /* XXX: check this for 8000Hz case */
-        n = 1;
-    } else {
-        n = SBLIMIT - 1;
-    }
-
-    ptr = g->sb_hybrid + 18;
-    for(i = n;i > 0;i--) {
-        float tmp0, tmp1;
-        float *csa = &csa_table_float[0][0];
-#define FLOAT_AA(j)\
-        tmp0= ptr[-1-j];\
-        tmp1= ptr[   j];\
-        ptr[-1-j] = tmp0 * csa[0+4*j] - tmp1 * csa[1+4*j];\
-        ptr[   j] = tmp0 * csa[1+4*j] + tmp1 * csa[0+4*j];
-
-        FLOAT_AA(0)
-        FLOAT_AA(1)
-        FLOAT_AA(2)
-        FLOAT_AA(3)
-        FLOAT_AA(4)
-        FLOAT_AA(5)
-        FLOAT_AA(6)
-        FLOAT_AA(7)
-
-        ptr += 18;
-    }
-}
+#endif
 
 static void compute_imdct(MPADecodeContext *s,
                           GranuleDef *g,
diff --git a/libavcodec/mpegaudiodec_float.c b/libavcodec/mpegaudiodec_float.c
index a8aebba654..93adaf8cc8 100644
--- a/libavcodec/mpegaudiodec_float.c
+++ b/libavcodec/mpegaudiodec_float.c
@@ -41,6 +41,45 @@ void ff_mpa_synth_filter_float(MPADecodeContext *s, float *synth_buf_ptr,
     *synth_buf_offset = offset;
 }
 
+static void compute_antialias_float(MPADecodeContext *s,
+                              GranuleDef *g)
+{
+    float *ptr;
+    int n, i;
+
+    /* we antialias only "long" bands */
+    if (g->block_type == 2) {
+        if (!g->switch_point)
+            return;
+        /* XXX: check this for 8000Hz case */
+        n = 1;
+    } else {
+        n = SBLIMIT - 1;
+    }
+
+    ptr = g->sb_hybrid + 18;
+    for(i = n;i > 0;i--) {
+        float tmp0, tmp1;
+        float *csa = &csa_table_float[0][0];
+#define FLOAT_AA(j)\
+        tmp0= ptr[-1-j];\
+        tmp1= ptr[   j];\
+        ptr[-1-j] = tmp0 * csa[0+4*j] - tmp1 * csa[1+4*j];\
+        ptr[   j] = tmp0 * csa[1+4*j] + tmp1 * csa[0+4*j];
+
+        FLOAT_AA(0)
+        FLOAT_AA(1)
+        FLOAT_AA(2)
+        FLOAT_AA(3)
+        FLOAT_AA(4)
+        FLOAT_AA(5)
+        FLOAT_AA(6)
+        FLOAT_AA(7)
+
+        ptr += 18;
+    }
+}
+
 #if CONFIG_MP1FLOAT_DECODER
 AVCodec mp1float_decoder =
 {