--- a/src/MACLib/Assembly/Assembly.h	2004-05-12 06:35:56.000000000 +0200
+++ b/src/MACLib/Assembly/Assembly.h	2026-10-19 16:55:40.308285231 +0200
@@ -1,12 +1,19 @@
 #ifndef APE_ASSEMBLY_H
 #define APE_ASSEMBLY_H
 
+#ifdef ENABLE_ASSEMBLY
 extern "C" 
 {
     void Adapt(short * pM, const short * pAdapt, int nDirection, int nOrder);
     int CalculateDotProduct(const short * pA, const short * pB, int nOrder);
     BOOL GetMMXAvailable();
 };
+#else
+// the NASM code is 32-bit x86 only, the C code paths are used without MMX
+static inline void Adapt(short *, const short *, int, int) { }
+static inline int CalculateDotProduct(const short *, const short *, int) { return 0; }
+static inline BOOL GetMMXAvailable() { return FALSE; }
+#endif
 
 #endif // #ifndef APE_ASSEMBLY_H
 
--- a/src/MACLib/Makefile.am	2004-05-12 06:25:01.000000000 +0200
+++ b/src/MACLib/Makefile.am	2026-10-19 16:53:56.296136944 +0200
@@ -1,6 +1,6 @@
 AUTOMAKE_OPTIONS = gnu
 
-SUBDIRS = Assembly Old
+SUBDIRS = Old
 
 lib_LTLIBRARIES = libmac.la
 
@@ -13,7 +13,7 @@ old_ldadd = $(top_builddir)/src/MACLib/O
 
 INCLUDES = -I$(top_srcdir)/src/Shared
 
-libmac_la_LIBADD = $(shared_ldadd) $(asm_ldadd) $(old_ldadd)
+libmac_la_LIBADD = $(shared_ldadd) $(old_ldadd)
 libmac_la_LDFLAGS = \
 	-export-dynamic \
 	-lstdc++ \
--- a/src/MACLib/Makefile.in	2004-05-12 06:25:01.000000000 +0200
+++ b/src/MACLib/Makefile.in	2026-10-19 16:53:56.294490948 +0200
@@ -86,7 +86,7 @@ VERSION = @VERSION@
 
 AUTOMAKE_OPTIONS = gnu
 
-SUBDIRS = Assembly Old
+SUBDIRS = Old
 
 lib_LTLIBRARIES = libmac.la
 
@@ -98,7 +98,7 @@ old_ldadd = $(top_builddir)/src/MACLib/O
 
 INCLUDES = -I$(top_srcdir)/src/Shared
 
-libmac_la_LIBADD = $(shared_ldadd) $(asm_ldadd) $(old_ldadd)
+libmac_la_LIBADD = $(shared_ldadd) $(old_ldadd)
 libmac_la_LDFLAGS =  	-export-dynamic 	-lstdc++ 	-version-info 2:0:0
 
 
@@ -118,7 +118,6 @@ CPPFLAGS = @CPPFLAGS@
 LDFLAGS = @LDFLAGS@
 LIBS = @LIBS@
 libmac_la_DEPENDENCIES =  $(top_builddir)/src/Shared/libmacshared.la \
-$(top_builddir)/src/MACLib/Assembly/libmacasm.la \
 $(top_builddir)/src/MACLib/Old/libmacold.la
 libmac_la_OBJECTS =  APECompress.lo APECompressCore.lo \
 APECompressCreate.lo APEDecompress.lo APEHeader.lo APEInfo.lo \