diff --git a/apps/codecs/libmad/SOURCES b/apps/codecs/libmad/SOURCES
index b7e1957326..a4ffcb5c64 100644
--- a/apps/codecs/libmad/SOURCES
+++ b/apps/codecs/libmad/SOURCES
@@ -14,6 +14,5 @@ imdct_mcf5249.S
 #endif
 #if defined(CPU_ARM)
 imdct_l_arm.S
-dct32_arm.S
 synth_full_arm.S
 #endif
diff --git a/apps/codecs/libmad/libmad.make b/apps/codecs/libmad/libmad.make
index 331ee8916f..58d2dc84e6 100644
--- a/apps/codecs/libmad/libmad.make
+++ b/apps/codecs/libmad/libmad.make
@@ -11,7 +11,18 @@
 # (one for codec, one for mpegplayer)
 # so a little trickery is necessary
 
-MADFLAGS = $(CODECFLAGS) -UDEBUG -DNDEBUG -O2 -I$(APPSDIR)/codecs/libmad -DHAVE_LIMITS_H
+# Extract optimization level ('-O') from compile flags. Will be set later.
+MADFLAGS = $(filter-out -O%,$(CODECFLAGS)) -I$(APPSDIR)/codecs/libmad
+MADFLAGS += -UDEBUG -DNDEBUG -DHAVE_LIMITS_H
+
+# libmad is faster on ARM-targets with -O1 than -O2
+ifeq ($(CPU),arm)
+   MADFLAGS += -O1
+else
+   MADFLAGS += -O2
+endif
+
+# MPEGplayer
 MPEGMADFLAGS = $(MADFLAGS) -DMPEGPLAYER
 
 # libmad
diff --git a/apps/codecs/libmad/synth.c b/apps/codecs/libmad/synth.c
index 7f1c2e6fc0..5ae9811ead 100644
--- a/apps/codecs/libmad/synth.c
+++ b/apps/codecs/libmad/synth.c
@@ -67,7 +67,8 @@ void mad_synth_mute(struct mad_synth *synth)
   }
 }
 
-#ifdef FPM_ARM
+#if 0 /* dct32 asm implementation is slower on current arm systems */
+/* #ifdef FPM_ARM */
 
 void dct32(mad_fixed_t const in[32], unsigned int slot,
            mad_fixed_t lo[16][8], mad_fixed_t hi[16][8]);
diff --git a/apps/codecs/mpa.c b/apps/codecs/mpa.c
index 2fa7d02bbd..6fea80807f 100644
--- a/apps/codecs/mpa.c
+++ b/apps/codecs/mpa.c
@@ -202,7 +202,7 @@ static void set_elapsed(struct mp3entry* id3)
  * Run the synthesis filter on the COProcessor 
  */
 
-static int mad_synth_thread_stack[DEFAULT_STACK_SIZE/sizeof(int)/2] IBSS_ATTR;
+static int mad_synth_thread_stack[DEFAULT_STACK_SIZE/sizeof(int)] IBSS_ATTR;
 
 static const unsigned char * const mad_synth_thread_name = "mp3dec";
 static unsigned int mad_synth_thread_id = 0;