diff --git a/matlab/analysis/importPX4log.m b/matlab/analysis/importPX4log.m
index 913cbf2638..335836058e 100644
--- a/matlab/analysis/importPX4log.m
+++ b/matlab/analysis/importPX4log.m
@@ -39,7 +39,7 @@ FORMAT_TO_STRUCT = {
     'e', {'int32', 0.01};
     'E', {'uint32', 0.01};
     'L', {'int32', 0.0000001};
-    'M', {'int8', 1};
+    'M', {'uint8', 1};
     'q', {'int64', 1};
     'Q', {'uint64', 1}};
 
@@ -185,7 +185,7 @@ else
     elseif strcmp('single',format_type)
         dataLen = 4;
     end
-    data = typecast(uint8(byte_array(thisPtr:(thisPtr+dataLen-1))),format_type)*mult;
+    data = double(typecast(uint8(byte_array(thisPtr:(thisPtr+dataLen-1))),format_type))*mult;
 end
 end