diff --git a/cores/arduino/Stream.cpp b/cores/arduino/Stream.cpp
index 1f2f074..f67b431 100644
--- a/cores/arduino/Stream.cpp
+++ b/cores/arduino/Stream.cpp
@@ -185,7 +185,7 @@ float Stream::parseFloat(char skipChar){
     read();  // consume the character we got with peek
     c = timedPeek();
   }
-  while( (c >= '0' && c <= '9')  || c == '.' || c == skipChar );
+  while( (c >= '0' && c <= '9')  || c == '.' && !isFraction || c == skipChar );
 
   if(isNegative)
     value = -value;