diff -ru Maaate-0.3.1.orig/src/mpeg/MPEGfile.cc Maaate-0.3.1/src/mpeg/MPEGfile.cc
--- src/mpeg/MPEGfile.cc	2023-06-26 14:31:17.838303000 +0200
+++ src/mpeg/MPEGfile.cc	2023-06-26 14:32:19.227754000 +0200
@@ -495,7 +495,7 @@
 
 #define MAXSEARCH 2048
   // read 4 bytes into header bitfield
-  register unsigned short buf=0;
+  unsigned short buf=0;
 
   // read over initial junk to find header; give up after 2048 bytes
   int i=-2;
@@ -503,7 +503,7 @@
   while (((buf & 0xfff0) != 0xfff0) && (i<MAXSEARCH)) {
     if ((buf & 0x00ff) == 0x00ff) {
       // only need to read next byte to try and get sync word
-      register unsigned char buf2=0;
+      unsigned char buf2=0;
       if (fread(&buf2, sizeof (unsigned char), 1, fd) != 1) {
 	return false;
       }
diff -ru Maaate-0.3.1.orig/src/mpeg/allLayers.cc Maaate-0.3.1/src/mpeg/allLayers.cc
--- src/mpeg/allLayers.cc	2023-06-26 14:31:17.836537000 +0200
+++ src/mpeg/allLayers.cc	2023-06-26 14:31:40.156675000 +0200
@@ -246,7 +246,7 @@
 			int     ch,
 			short  samples[SBLIMIT])
 {
-    register double         *bufOffsetPtr, sum;
+    double         *bufOffsetPtr, sum;
     static int      init = 1;
     typedef double  NN[64][SBLIMIT];
     static NN      *filter;
@@ -254,14 +254,14 @@
     static BB      *buf;
     static int      bufOffset[2] = {64,64};
    // count # samples clipped
-    //    register int             clip = 0;
-//    register int             offset;
-    register long            foo;
-//    register double         *filterp;
-//    register double         *bandp;
+    //    int             clip = 0;
+//    int             offset;
+    long            foo;
+//    double         *filterp;
+//    double         *bandp;
 
     int i;
-    register double tmp;
+    double tmp;
     double p0,p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12,p13,p14,p15;
     double pp0,pp1,pp2,pp3,pp4,pp5,pp6,pp7,pp8,pp9,pp10,pp11,pp12,pp13,pp14,pp15;
 
diff -ru Maaate-0.3.1.orig/src/mpeg/layer2.cc Maaate-0.3.1/src/mpeg/layer2.cc
--- src/mpeg/layer2.cc	2023-06-26 14:31:17.837389000 +0200
+++ src/mpeg/layer2.cc	2023-06-26 14:32:02.476148000 +0200
@@ -1381,7 +1381,7 @@
 	for (ss=0; ss<3; ss++) {
 	  if (allocation[ch][sub]) {
 	    int  x = 0;
-	    register double r;
+	    double r;
 
 	    // Locate MSB in the sample
 	    // u is set outside loop to hopefully speed up the loop
@@ -1391,7 +1391,7 @@
  
 	    // MSB inversion
 	    // read sample
-	    register unsigned int samp 
+	    unsigned int samp 
 	      = samples[no][ch][ss][sub];  
 	    x = 1L << (x - 1);          // for MSB test
 	    if ((samp & x)) {
@@ -1404,7 +1404,7 @@
 	    r += (double)(samp & (x - 1)) / (double)x;
 			
 	    // calculate index
-	    register unsigned int indx 
+	    unsigned int indx 
 	      = alloctable[sub][allocation[ch][sub]].quant;
  
 	    // Dequantize the sample