diff --git a/src/add-ons/media/plugins/avcodec/libavcodec/ppc/Jamfile b/src/add-ons/media/plugins/avcodec/libavcodec/ppc/Jamfile
index 84e01041c3..d3dede6b10 100644
--- a/src/add-ons/media/plugins/avcodec/libavcodec/ppc/Jamfile
+++ b/src/add-ons/media/plugins/avcodec/libavcodec/ppc/Jamfile
@@ -15,33 +15,22 @@ if $(HAIKU_GCC_VERSION[1]) >= 3 {
 	SubDirCcFlags -fomit-frame-pointer -DPIC ;
 }
 
+# Enable altivec support
+SubDirCcFlags -faltivec -maltivec -mabi=altivec ;
+
 local defines ;
 defines = HAVE_AV_CONFIG_H=1 ;
-
-if $(TARGET_ARCH) = x86 {
-    defines += ARCH_X86=1 ARCH_X86_32=1 ARCH_PPC=0 ARCH_SPARC=0 ;
-    defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
-    defines += HAVE_MMX=1 HAVE_MMX2=1 HAVE_SSE=0 HAVE_SSE3=1 ; 
-    defines += HAVE_ALTIVEC=0 ;
-	defines += HAVE_VIS=0 ;
-} else if $(TARGET_ARCH) = ppc {
-    defines += ARCH_X86=0 ARCH_X86_32=0 ARCH_PPC=1 ARCH_SPARC=0 ;
-    defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
-    defines += HAVE_MMX=0 HAVE_MMX2=0 HAVE_SSE=0 HAVE_SSE3=0 ; 
-    defines += HAVE_ALTIVEC=1 ;
-	defines += HAVE_VIS=0 ;
-} else if $(TARGET_ARCH) = sparc {
-    defines += ARCH_X86=0 ARCH_X86_32=0 ARCH_PPC=0 ARCH_SPARC=1 ;
-    defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
-    defines += HAVE_MMX=0 HAVE_MMX2=0 HAVE_SSE=0 HAVE_SSE3=0 ; 
-    defines += HAVE_ALTIVEC=0 ;
-	defines += HAVE_VIS=1 ;
-}
+defines += ARCH_X86=0 ARCH_X86_32=0 ARCH_PPC=1 ARCH_SPARC=0 ;
+defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
+defines += HAVE_MMX=0 HAVE_MMX2=0 HAVE_SSE=0 HAVE_SSE3=0 ; 
+defines += HAVE_ALTIVEC=1 HAVE_ALTIVEC_H=0 ;
+defines += HAVE_VIS=0 ;
 
 defines = [ FDefines $(defines) ] ;
 SubDirCcFlags $(defines) ;
 SubDirC++Flags $(defines) ;
 
+
 StaticLibrary libavcodec_ppc.a :
 	check_altivec.c
     float_altivec.c
diff --git a/src/add-ons/media/plugins/avcodec/libavcodec/x86/Jamfile b/src/add-ons/media/plugins/avcodec/libavcodec/x86/Jamfile
index 35a31e08f7..7249eb0276 100644
--- a/src/add-ons/media/plugins/avcodec/libavcodec/x86/Jamfile
+++ b/src/add-ons/media/plugins/avcodec/libavcodec/x86/Jamfile
@@ -17,26 +17,11 @@ if $(HAIKU_GCC_VERSION[1]) >= 3 {
 
 local defines ;
 defines = HAVE_AV_CONFIG_H=1 ;
-
-if $(TARGET_ARCH) = x86 {
-    defines += ARCH_X86=1 ARCH_X86_32=1 ARCH_PPC=0 ARCH_SPARC=0 ;
-    defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
-    defines += HAVE_MMX=1 HAVE_MMX2=1 HAVE_SSE=0 HAVE_SSE3=1 ; 
-    defines += HAVE_ALTIVEC=0 ;
-	defines += HAVE_VIS=0 ;
-} else if $(TARGET_ARCH) = ppc {
-    defines += ARCH_X86=0 ARCH_X86_32=0 ARCH_PPC=1 ARCH_SPARC=0 ;
-    defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
-    defines += HAVE_MMX=0 HAVE_MMX2=0 HAVE_SSE=0 HAVE_SSE3=0 ; 
-    defines += HAVE_ALTIVEC=1 ;
-	defines += HAVE_VIS=0 ;
-} else if $(TARGET_ARCH) = sparc {
-    defines += ARCH_X86=0 ARCH_X86_32=0 ARCH_PPC=0 ARCH_SPARC=1 ;
-    defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
-    defines += HAVE_MMX=0 HAVE_MMX2=0 HAVE_SSE=0 HAVE_SSE3=0 ; 
-    defines += HAVE_ALTIVEC=0 ;
-	defines += HAVE_VIS=1 ;
-}
+defines += ARCH_X86=1 ARCH_X86_32=1 ARCH_PPC=0 ARCH_SPARC=0 ;
+defines += HAVE_AMD3DNOW=0 HAVE_AMD3DNOWEXT=0 ;
+defines += HAVE_MMX=1 HAVE_MMX2=1 HAVE_SSE=0 HAVE_SSE3=1 ; 
+defines += HAVE_ALTIVEC=0 ;
+defines += HAVE_VIS=0 ;
 
 defines = [ FDefines $(defines) ] ;
 SubDirCcFlags $(defines) ;