diff --git a/doc/log/commit_log_v1.1.txt b/doc/log/commit_log_v1.1.txt
index ebd0197..b4d13b4 100644
--- a/doc/log/commit_log_v1.1.txt
+++ b/doc/log/commit_log_v1.1.txt
@@ -1,3 +1,15 @@
+----------------
+Date: 2017-07-17
+Author: Sonny Jeon
+Subject: Clean up and new streaming script check-mode feature.
+
+[new] The stream.py streaming script now has a check-mode option, where it will place Grbl in $C check mode automatically and then stream the g-code program. It's a very fast way to check if the g-code program has any errors.
+
+[fix] The debug variable was not initialized if the debug option was enabled in config.h
+
+[fix] Updated error_codes CSV file to the same format as the others.
+
+
 ----------------
 Date: 2017-05-31
 Author: chamnit
diff --git a/grbl/grbl.h b/grbl/grbl.h
index 15b529e..f4eb0dd 100644
--- a/grbl/grbl.h
+++ b/grbl/grbl.h
@@ -23,7 +23,7 @@
 
 // Grbl versioning system
 #define GRBL_VERSION "1.1f"
-#define GRBL_VERSION_BUILD "20170717"
+#define GRBL_VERSION_BUILD "20170731"
 
 // Define standard libraries used by Grbl.
 #include <avr/io.h>
diff --git a/grbl/stepper.c b/grbl/stepper.c
index 09e83fd..2f6b18b 100644
--- a/grbl/stepper.c
+++ b/grbl/stepper.c
@@ -808,7 +808,7 @@ void st_prep_buffer()
           speed_var = pl_block->acceleration*time_var;
           mm_var = time_var*(prep.current_speed - 0.5*speed_var);
           mm_remaining -= mm_var;
-          if ((mm_remaining < prep.accelerate_until) || (mm_var <= 0)) {
+          if ((mm_remaining <= prep.accelerate_until) || (mm_var <= 0.0)) {
             // Cruise or cruise-deceleration types only for deceleration override.
             mm_remaining = prep.accelerate_until; // NOTE: 0.0 at EOB
             time_var = 2.0*(pl_block->millimeters-mm_remaining)/(prep.current_speed+prep.maximum_speed);