diff --git a/.cproject b/.cproject
index 2b62475..0d0309c 100644
--- a/.cproject
+++ b/.cproject
@@ -20,7 +20,7 @@
 							<option id="cdt.managedbuild.option.gnu.cross.prefix.2020618933" name="Prefix" superClass="cdt.managedbuild.option.gnu.cross.prefix"/>
 							<option id="cdt.managedbuild.option.gnu.cross.path.2061765984" name="Path" superClass="cdt.managedbuild.option.gnu.cross.path"/>
 							<targetPlatform archList="all" binaryParser="org.eclipse.cdt.core.ELF" id="cdt.managedbuild.targetPlatform.gnu.cross.912403626" isAbstract="false" osList="all" superClass="cdt.managedbuild.targetPlatform.gnu.cross"/>
-							<builder id="cdt.managedbuild.builder.gnu.cross.571430866" keepEnvironmentInBuildfile="false" managedBuildOn="false" name="Gnu Make Builder" parallelBuildOn="true" parallelizationNumber="optimal" superClass="cdt.managedbuild.builder.gnu.cross"/>
+							<builder id="cdt.managedbuild.builder.gnu.cross.571430866" keepEnvironmentInBuildfile="false" managedBuildOn="false" name="Gnu Make Builder" parallelBuildOn="false" superClass="cdt.managedbuild.builder.gnu.cross"/>
 							<tool id="cdt.managedbuild.tool.gnu.cross.c.compiler.636372948" name="Cross GCC Compiler" superClass="cdt.managedbuild.tool.gnu.cross.c.compiler">
 								<inputType id="cdt.managedbuild.tool.gnu.c.compiler.input.102930183" superClass="cdt.managedbuild.tool.gnu.c.compiler.input"/>
 							</tool>
diff --git a/chconf.h b/chconf.h
index 29c99d7..682a459 100644
--- a/chconf.h
+++ b/chconf.h
@@ -158,6 +158,8 @@
  */
 #ifdef TINYSA4
 #define CH_CFG_USE_WAITEXIT                 TRUE
+#else
+#define CH_CFG_USE_WAITEXIT                 FALSE
 #endif
 
 /**
diff --git a/main.c b/main.c
index 622da6e..e6701ed 100644
--- a/main.c
+++ b/main.c
@@ -2243,6 +2243,8 @@ const char *get_hw_version_text(void)
   hw_if = 0;
   return "Unknown";
 }
+#else
+const char *hw_text = "ZS304";
 #endif
 
 VNA_SHELL_FUNCTION(cmd_version)
diff --git a/nanovna.h b/nanovna.h
index fb47599..d585b32 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -18,7 +18,7 @@
  */
 #include "ch.h"
 
-//#ifdef TINYSA_F303
+#ifdef TINYSA_F303
 #ifdef TINYSA_F072
 #error "Remove comment for #ifdef TINYSA_F303"
 #endif
@@ -26,7 +26,7 @@
 #define TINYSA4
 #endif
 #define TINYSA4_PROTO
-//#endif
+#endif
 
 #ifdef TINYSA_F072
 #ifdef TINYSA_F303
diff --git a/sa_cmd.c b/sa_cmd.c
index 61abde1..2d72b83 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -602,7 +602,9 @@ VNA_SHELL_FUNCTION(cmd_rbw)
 
 VNA_SHELL_FUNCTION(cmd_if)
 {
+#ifdef TINYSA4
   char *t = "975M..979M";
+#endif
   if (argc != 1 || argv[0][0] == '?') {
   usage:
 #ifdef TINYSA4
@@ -616,8 +618,10 @@ VNA_SHELL_FUNCTION(cmd_if)
   }
   freq_t a = (freq_t)my_atoi(argv[0]);
   freq_t f = DEFAULT_IF;
+#ifdef TINYSA4
   if (hw_if)
     f = DEFAULT_IF_PLUS;
+#endif
   if (a!= 0 &&( a < (f - (freq_t)5000000) || a>(f + (freq_t)5000000)))
     goto usage;
   setting.auto_IF = false;