diff --git a/tests/memanalyze.pl b/tests/memanalyze.pl
index d5cd929c6d..d65ef39afe 100755
--- a/tests/memanalyze.pl
+++ b/tests/memanalyze.pl
@@ -175,13 +175,13 @@ while(<$fileh>) {
             $size = $1;
             $addr = $2;
 
-            if($sizeataddr{$addr}>0) {
+            if($sizeataddr{$addr} && $sizeataddr{$addr}>0) {
                 # this means weeeeeirdo
                 print "Mixed debug compile ($source:$linenum at line $lnum), rebuild curl now\n";
                 print "We think $sizeataddr{$addr} bytes are already allocated at that memory address: $addr!\n";
             }
 
-            $sizeataddr{$addr}=$size;
+            $sizeataddr{$addr} = $size;
             $totalmem += $size;
             $memsum += $size;