diff --git a/contrib/distro-tools/build_nwchem b/contrib/distro-tools/build_nwchem
index f108040be0..8ef3a7cd58 100755
--- a/contrib/distro-tools/build_nwchem
+++ b/contrib/distro-tools/build_nwchem
@@ -1743,12 +1743,6 @@ if [ ${#NWCHEM_OS} -eq 0 ] ; then
         # There is no CYGNUS64 target so set NWCHEM_TARGET here
         export NWCHEM_TARGET=${NWCHEM_OS}
       fi
-    elif [ `expr match ${NWCHEM_OS} INTERIX` != "0" ] ; then
-      export NWCHEM_OS=INTERIX
-      if [ ${#NWCHEM_TARGET} -eq 0 ] ; then
-        # There is no INTERIX64 target so set NWCHEM_TARGET here
-        export NWCHEM_TARGET=${NWCHEM_OS}
-      fi
     fi
   fi
 fi
diff --git a/contrib/distro-tools/build_nwchem_src_distro b/contrib/distro-tools/build_nwchem_src_distro
index 4019e3669d..3cf866a0cd 100755
--- a/contrib/distro-tools/build_nwchem_src_distro
+++ b/contrib/distro-tools/build_nwchem_src_distro
@@ -54,8 +54,6 @@ if [ ${#NWCHEM_TARGET} -eq 0 ] ; then
       export NWCHEM_TARGET=CYGWIN
     elif [ `expr match ${NWCHEM_OS} CYGNUS` != "0" ] ; then
       export NWCHEM_TARGET=CYGNUS
-    elif [ `expr match ${NWCHEM_OS} INTERIX` != "0" ] ; then
-      export NWCHEM_TARGET=INTERIX
     else
       export NWCHEM_TARGET=LINUX64
     fi
diff --git a/src/config/makefile.h b/src/config/makefile.h
index 07205a1b6d..8015ced1ac 100644
--- a/src/config/makefile.h
+++ b/src/config/makefile.h
@@ -1277,7 +1277,7 @@ endif
 endif
 
 
-ifeq ($(TARGET),$(findstring $(TARGET),LINUX CYGNUS CYGWIN INTERIX))
+ifeq ($(TARGET),$(findstring $(TARGET),LINUX CYGNUS CYGWIN))
 #
 #
 # Linux or Cygwin under Windows running on an x86 using g77
diff --git a/src/peigs/DEFS b/src/peigs/DEFS
index 2befee60b4..78b94739f3 100644
--- a/src/peigs/DEFS
+++ b/src/peigs/DEFS
@@ -614,7 +614,7 @@ peigs_FC +=     -DSTD_DBL  -D$(peigs_COMM)  -Ovector2
   endif
 endif
 
-ifeq ($(peigs_TARGET),$(findstring $(peigs_TARGET),LINUX INTERIX CYGWIN CYGNUS))
+ifeq ($(peigs_TARGET),$(findstring $(peigs_TARGET),LINUX CYGWIN CYGNUS))
 #
 # Linux running on an x86 using f77 on f2c
 #
diff --git a/src/peigs/comm/GNUmakefile b/src/peigs/comm/GNUmakefile
index 7a4d854442..eb2b71e05e 100644
--- a/src/peigs/comm/GNUmakefile
+++ b/src/peigs/comm/GNUmakefile
@@ -3,7 +3,7 @@
 #
 include ../../config/makefile.h
 include ../DEFS
-NOCASENS = CYGNUS MACX64 MACX CYGWIN CYGWIN64 INTERIX
+NOCASENS = CYGNUS MACX64 MACX CYGWIN CYGWIN64
 ifneq ($(peigs_TARGET),$(findstring $(peigs_TARGET), $(NOCASENS)))
 	REMOVESF=TRUE
 endif
diff --git a/src/peigs/src/f77/GNUmakefile b/src/peigs/src/f77/GNUmakefile
index 1592b4318d..538975d5b6 100644
--- a/src/peigs/src/f77/GNUmakefile
+++ b/src/peigs/src/f77/GNUmakefile
@@ -4,7 +4,7 @@
 
 include ../../../config/makefile.h
 include ../../DEFS
-NOCASENS = CYGNUS MACX64 MACX CYGWIN CYGWIN64 INTERIX
+NOCASENS = CYGNUS MACX64 MACX CYGWIN CYGWIN64
 ifneq ($(peigs_TARGET),$(findstring $(peigs_TARGET), $(NOCASENS)))
 	REMOVESF=TRUE
 endif
diff --git a/src/selci/cputm.c b/src/selci/cputm.c
index 7264193aba..5b0fe191ad 100644
--- a/src/selci/cputm.c
+++ b/src/selci/cputm.c
@@ -24,11 +24,7 @@ int *ai;
 #ifndef WIN32
   /* !!! Comment out function for WIN32 just so we can keep going */
 struct timeval tp;
-#ifdef __INTERIX
-char tzp[10];
-#else
 struct timezone tzp;
-#endif
 int i;
 
 	gettimeofday(&tp,&tzp);
diff --git a/src/util/GNUmakefile b/src/util/GNUmakefile
index 8a4891fb8b..f5b4724f93 100644
--- a/src/util/GNUmakefile
+++ b/src/util/GNUmakefile
@@ -104,12 +104,10 @@ ifdef NO_MPIF
   LIB_DEFINES += -DNO_MPIF
 endif
 
-ifeq ($(TARGET),$(findstring $(TARGET),BGL BGP BGQ LINUX CYGWIN CYGWIN64 CYGNUS INTERIX LINUX64 MACX MACX64))
+ifeq ($(TARGET),$(findstring $(TARGET),BGL BGP BGQ LINUX CYGWIN CYGWIN64 CYGNUS LINUX64 MACX MACX64))
   EXTRA_OBJ = linux_cpu.o linux_shift.o linux_random.o  erfc.o linux_printaff.o
   ifeq ($(LINUXCPU),x86)
-    ifneq ($(TARGET),INTERIX)
-      EXTRA_OBJ += linux_setfpucw.o
-    endif
+    EXTRA_OBJ += linux_setfpucw.o
   endif
   LIB_DEFINES += -DBYTE_SHORT_PACKING  
   ifeq ($(FC),ifc)
@@ -253,9 +251,6 @@ ifdef SPEECH
    OBJ += udp.o
 endif
 
-ifeq ($(TARGET),INTERIX)
-DEFINES += -DNOSOCKLEN
-endif
 ifeq ($(TARGET),LINUX)
 DEFINES += -DNEED_LOC
 endif