diff --git a/ChangeLog b/ChangeLog
index 810e0eb40a..4b09926805 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3700,3 +3700,6 @@
 	* cloudctrl/src/up_chipid.c and shenzhou/src/up_chipid.c:  Add functions to
 	  get chip ID.  Contributed by Darcy Gong.  These should not be board-dependent,
 	  but should be in arch/arm/src/stm32 where they can be used from any board.
+	* sched/work_thread.c: Fix backward conditional compilation.  This might
+	  has caused a memory leadk.  From Freddie Chopin.
+
diff --git a/configs/z8f64200100kit/ostest/Make.defs b/configs/z8f64200100kit/ostest/Make.defs
index 80a79eca46..05c2b1593b 100644
--- a/configs/z8f64200100kit/ostest/Make.defs
+++ b/configs/z8f64200100kit/ostest/Make.defs
@@ -41,7 +41,7 @@ include $(TOPDIR)/tools/Config.mk
 ZDSVERSION := 5.0.0
 
 ifeq ($(CONFIG_WINDOWS_NATIVE),y)
-  ZDSINSTALLDIR := C:/PROGRA~2/ZiLOG/ZZDSII_Z8Encore!_$(ZDSVERSION)
+  ZDSINSTALLDIR := C:/PROGRA~2/ZiLOG/ZDSII_Z8Encore!_$(ZDSVERSION)
   INSTALLDIR = ${shell echo $(ZDSINSTALLDIR)| sed -e "s/\//\\/g"}
   ZDSBINDIR := $(INSTALLDIR)\bin
   ZDSSTDINCDIR := $(INSTALLDIR)\include\std
@@ -63,7 +63,7 @@ endif
   ARCHUSRINCLUDES = -usrinc:.
 else
   WINTOOL := y
-  ZDSINSTALLDIR := C:/Program Files (x86)/ZiLOG/ZZDSII_Z8Encore!_$(ZDSVERSION)
+  ZDSINSTALLDIR := C:/Program Files (x86)/ZiLOG/ZDSII_Z8Encore!_$(ZDSVERSION)
   INSTALLDIR = ${shell cygpath -u "$(ZDSINSTALLDIR)"}
   ZDSBINDIR := $(INSTALLDIR)/bin
   ZDSSTDINCDIR := $(INSTALLDIR)/include/std
diff --git a/sched/work_thread.c b/sched/work_thread.c
index abd86f7710..5646b06a1b 100644
--- a/sched/work_thread.c
+++ b/sched/work_thread.c
@@ -208,10 +208,10 @@ int work_hpthread(int argc, char *argv[])
        * that were queued because they could not be freed in that execution
        * context (for example, if the memory was freed from an interrupt handler).
        * NOTE: If the work thread is disabled, this clean-up is performed by
-       * the IDLE thread (at a very, very lower priority).
+       * the IDLE thread (at a very, very low priority).
        */
 
-#ifdef CONFIG_SCHED_LPWORK
+#ifndef CONFIG_SCHED_LPWORK
       sched_garbagecollection();
 #endif
 
@@ -236,7 +236,7 @@ int work_lpthread(int argc, char *argv[])
        * that were queued because they could not be freed in that execution
        * context (for example, if the memory was freed from an interrupt handler).
        * NOTE: If the work thread is disabled, this clean-up is performed by
-       * the IDLE thread (at a very, very lower priority).
+       * the IDLE thread (at a very, very low priority).
        */
 
       sched_garbagecollection();