diff --git a/Cantera/src/transport/AqueousTransport.cpp b/Cantera/src/transport/AqueousTransport.cpp
index 085b07391..520f9cad4 100644
--- a/Cantera/src/transport/AqueousTransport.cpp
+++ b/Cantera/src/transport/AqueousTransport.cpp
@@ -15,7 +15,7 @@
 #endif
 
 #include "ThermoPhase.h"
-#include "LiquidTransport.h"
+#include "AqueousTransport.h"
 
 #include "utilities.h"
 #include "TransportParams.h"
@@ -437,14 +437,14 @@ namespace Cantera {
 
     doublereal pres = m_thermo->pressure();
     // Check for changes in the mole fraction vector.
-    int iStateNew = m_thermo->getIStateMF();
-    if (iStateNew == m_iStateMF) {
-      if (pres == m_press) {
-	return;
-      }
-    } else {
-      m_iStateMF = iStateNew;
-    }
+    //int iStateNew = m_thermo->getIStateMF();
+    //if (iStateNew == m_iStateMF) {
+    //  if (pres == m_press) {
+    //	return;
+    //     }
+   // } else {
+    //  m_iStateMF = iStateNew;
+    //}
     m_press = pres;
 
     // signal that concentration-dependent quantities will need to
@@ -688,7 +688,7 @@ namespace Cantera {
       }
 
       //! invert and solve the system  Ax = b. Answer is in m_B
-      solve(m_A, m_B);
+      //solve(m_A, m_B);
     
       m_flux = m_B;
 	
@@ -718,7 +718,7 @@ namespace Cantera {
       }
 
       //! invert and solve the system  Ax = b. Answer is in m_B
-      solve(m_A, m_B);
+      //solve(m_A, m_B);
     
       m_flux = m_B;
 	
diff --git a/Cantera/src/transport/LiquidTransport.cpp b/Cantera/src/transport/LiquidTransport.cpp
index 07143106e..8bf2ff4ae 100644
--- a/Cantera/src/transport/LiquidTransport.cpp
+++ b/Cantera/src/transport/LiquidTransport.cpp
@@ -424,14 +424,14 @@ namespace Cantera {
 
     doublereal pres = m_thermo->pressure();
     // Check for changes in the mole fraction vector.
-    int iStateNew = m_thermo->getIStateMF();
-    if (iStateNew == m_iStateMF) {
-      if (pres == m_press) {
-	return;
-      }
-    } else {
-      m_iStateMF = iStateNew;
-    }
+    //int iStateNew = m_thermo->getIStateMF();
+    //if (iStateNew == m_iStateMF) {
+    //  if (pres == m_press) {
+//	return;
+ //     }
+  //  } else {
+   //   m_iStateMF = iStateNew;
+    //}
     m_press = pres;
 
     // signal that concentration-dependent quantities will need to
@@ -675,7 +675,7 @@ namespace Cantera {
       }
 
       //! invert and solve the system  Ax = b. Answer is in m_B
-      solve(m_A, m_B);
+      //solve(m_A, m_B);
     
       m_flux = m_B;
 	
@@ -705,7 +705,7 @@ namespace Cantera {
       }
 
       //! invert and solve the system  Ax = b. Answer is in m_B
-      solve(m_A, m_B);
+      //solve(m_A, m_B);
     
       m_flux = m_B;
 	
diff --git a/Cantera/src/transport/Makefile.in b/Cantera/src/transport/Makefile.in
index caf985c79..ed985e530 100644
--- a/Cantera/src/transport/Makefile.in
+++ b/Cantera/src/transport/Makefile.in
@@ -1,6 +1,6 @@
 #/bin/sh
 ###############################################################
-#  $Author$
+# 
 #  $Date$
 #  $Revision$
 #
@@ -15,6 +15,10 @@ INCDIR = ../../../build/include/cantera/kernel
 INSTALL_TSC = ../../../bin/install_tsc
 do_ranlib = @DO_RANLIB@
 
+do_electro = @COMPILE_ELECTROLYTES@
+do_issp    = @COMPILE_IDEAL_SOLUTIONS@
+
+
 PURIFY=@PURIFY@
 
 PIC_FLAG=@PIC@
@@ -27,25 +31,40 @@ else
 endif
 
 
-
 CXX_FLAGS = @CXXFLAGS@ $(CXX_OPT) $(PIC_FLAG) $(DEBUG_FLAG)
 
-# Transport Object Files
-OBJS    = TransportFactory.o MultiTransport.o MixTransport.o MMCollisionInt.o \
-          SolidTransport.o DustyGasTransport.o LiquidTransport.o
+# Base Transport Object Files
+TRAN_OBJ    = TransportFactory.o MultiTransport.o MixTransport.o MMCollisionInt.o \
+              SolidTransport.o DustyGasTransport.o
 
 TRAN_H  =  TransportFactory.h MultiTransport.h MixTransport.h \
            MMCollisionInt.h  SolidTransport.h DustyGasTransport.h \
-           TransportBase.h L_matrix.h TransportParams.h LiquidTransport.h
+           TransportBase.h L_matrix.h TransportParams.h
+
+ifeq ($(do_electro),1)
+do_issp = 1
+ELECTRO_OBJ = AqueousTransport.o 
+ELECTRO_H  =  AqueousTransport.h
+endif
+
+ifeq ($(do_issp),1)
+ISSP_OBJ = LiquidTransport.o 
+ISSP_H   = LiquidTransport.h LiquidTransportParams.h
+endif
+
+
+CATRAN_OBJ = $(TRAN_OBJ) $(ELECTRO_OBJ) $(ISSP_OBJ)
+
+CATRAN_H   = $(TRAN_H) $(ELECTRO_H) $(ISSP_H)
 
 CXX_INCLUDES = -I../base -I../thermo -I../numerics @CXX_INCLUDES@
 LIB = @buildlib@/libtransport.a
 
-DEPENDS = $(OBJS:.o=.d)
+DEPENDS = $(CATRAN_OBJ:.o=.d)
 
 all:  $(LIB) .depends
 	@(@INSTALL@ -d $(INCDIR))
-	@(for lh in $(TRAN_H) ; do \
+	@(for lh in $(CATRAN_H) ; do \
 	  $(INSTALL_TSC) "$${lh}" $(INCDIR) ; \
 	done)
 %.d: Makefile %.o
@@ -54,14 +73,14 @@ all:  $(LIB) .depends
 .cpp.o:
 	$(PURIFY) @CXX@ -c $< $(CXX_FLAGS) $(CXX_INCLUDES)
 
-$(LIB): $(OBJS) $(TRAN_H)
-	@ARCHIVE@ $(LIB) $(OBJS) > /dev/null
+$(LIB): $(CATRAN_OBJ) $(CATRAN_H)
+	@ARCHIVE@ $(LIB) $(CATRAN_OBJ) > /dev/null
 ifeq ($(do_ranlib),1)
 	@RANLIB@ $(LIB)
 endif
 
 clean:
-	@(for lh in $(TRAN_H) ; do \
+	@(for lh in $(CATRAN_H) ; do \
             th=$(INCDIR)/"$${lh}" ; \
 	    if test -f "$${th}" ; then \
 	      $(RM) "$${th}"  ; \
@@ -83,9 +102,8 @@ depends:
 .depends: $(DEPENDS)
 	cat *.d > .depends
 
-$(OBJS): Makefile
+$(CATRAN_OBJ): Makefile
 
-$(OBJS): Makefile
 
 TAGS: 
 	etags *.h *.cpp
diff --git a/Cantera/src/transport/TransportFactory.cpp b/Cantera/src/transport/TransportFactory.cpp
index b31ee702c..35411f696 100755
--- a/Cantera/src/transport/TransportFactory.cpp
+++ b/Cantera/src/transport/TransportFactory.cpp
@@ -337,14 +337,18 @@ namespace Cantera {
       dtr = (DustyGasTransport*)tr;
       dtr->initialize(phase, gastr);
       break;
+#ifdef WITH_IDEAL_SOLUTIONS
     case cLiquidTransport:
       tr = new LiquidTransport;
       tr->setThermo(*phase);
       break;
+#endif
+#ifdef WITH_ELECTROLYTES
     case cAqueousTransport:
       tr = new AqueousTransport;
       tr->setThermo(*phase);
       break;
+#endif
     default:
       throw CanteraError("newTransport","unknown transport model");
     }