diff --git a/src/SlaveLogParser.jl b/src/SlaveLogParser.jl
index 0c6b70b..f2ad3b5 100644
--- a/src/SlaveLogParser.jl
+++ b/src/SlaveLogParser.jl
@@ -149,7 +149,8 @@ function parse_power_section!(lines::Base.Iterators.Stateful)::PowerResult
     end
     line = popfirst!(lines)
     fpga_temp = let
-        m = match(r"^FPGA Temprature \[C\] = ([\d|\.]+)$", line)
+        # can be minus (see 127_172.txt)
+        m = match(r"^FPGA Temprature \[C\] = (-?[\d|\.]+)$", line)
         parse(Float64, m[1])
     end
     line = popfirst!(lines)