diff --git a/platforms/android/app/src/main/cpp/main.c b/platforms/android/app/src/main/cpp/main.c
index d492178..290d0ec 100644
--- a/platforms/android/app/src/main/cpp/main.c
+++ b/platforms/android/app/src/main/cpp/main.c
@@ -22,7 +22,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    size_t fsize = fib32_wasm_len-1;
+    size_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
 
diff --git a/platforms/arduino/src/main.cpp b/platforms/arduino/src/main.cpp
index a563490..2ab1149 100644
--- a/platforms/arduino/src/main.cpp
+++ b/platforms/arduino/src/main.cpp
@@ -21,7 +21,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    size_t fsize = fib32_wasm_len-1;
+    size_t fsize = fib32_wasm_len;
 
     Serial.println("Loading WebAssembly...");
 
diff --git a/platforms/bluepill/src/main.cpp b/platforms/bluepill/src/main.cpp
index 1eb5d59..c2aac41 100644
--- a/platforms/bluepill/src/main.cpp
+++ b/platforms/bluepill/src/main.cpp
@@ -21,7 +21,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    size_t fsize = fib32_wasm_len-1;
+    size_t fsize = fib32_wasm_len;
 
     puts("Loading WebAssembly...");
 
diff --git a/platforms/emscripten/main.c b/platforms/emscripten/main.c
index 21393bb..fff595e 100644
--- a/platforms/emscripten/main.c
+++ b/platforms/emscripten/main.c
@@ -23,7 +23,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    size_t fsize = fib32_wasm_len-1;
+    size_t fsize = fib32_wasm_len;
 
     IM3Environment env = m3_NewEnvironment ();
     if (!env) FATAL("m3_NewEnvironment failed");
diff --git a/platforms/esp32-idf-wasi/main/main.cpp b/platforms/esp32-idf-wasi/main/main.cpp
index bf43fa7..3b623ba 100644
--- a/platforms/esp32-idf-wasi/main/main.cpp
+++ b/platforms/esp32-idf-wasi/main/main.cpp
@@ -24,7 +24,7 @@ static void run_wasm(void)
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)wasi_test_wasm;
-    uint32_t fsize = wasi_test_wasm_len-1;
+    uint32_t fsize = wasi_test_wasm_len;
 
     printf("Loading WebAssembly...\n");
     IM3Environment env = m3_NewEnvironment ();
diff --git a/platforms/esp32-idf/main/main.cpp b/platforms/esp32-idf/main/main.cpp
index ca207fd..a833867 100644
--- a/platforms/esp32-idf/main/main.cpp
+++ b/platforms/esp32-idf/main/main.cpp
@@ -23,7 +23,7 @@ static void run_wasm(void)
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    uint32_t fsize = fib32_wasm_len-1;
+    uint32_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
     IM3Environment env = m3_NewEnvironment ();
diff --git a/platforms/esp32-pio/src/main.cpp b/platforms/esp32-pio/src/main.cpp
index ca207fd..a833867 100644
--- a/platforms/esp32-pio/src/main.cpp
+++ b/platforms/esp32-pio/src/main.cpp
@@ -23,7 +23,7 @@ static void run_wasm(void)
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    uint32_t fsize = fib32_wasm_len-1;
+    uint32_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
     IM3Environment env = m3_NewEnvironment ();
diff --git a/platforms/esp8266/src/main.cpp b/platforms/esp8266/src/main.cpp
index 67a4ce6..7241b72 100644
--- a/platforms/esp8266/src/main.cpp
+++ b/platforms/esp8266/src/main.cpp
@@ -20,7 +20,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    uint32_t fsize = fib32_wasm_len-1;
+    uint32_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
     IM3Environment env = m3_NewEnvironment ();
diff --git a/platforms/fomu/src/main.c b/platforms/fomu/src/main.c
index 532405d..748ec48 100644
--- a/platforms/fomu/src/main.c
+++ b/platforms/fomu/src/main.c
@@ -49,7 +49,7 @@ bool run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    size_t fsize = fib32_wasm_len-1;
+    size_t fsize = fib32_wasm_len;
 
     uart_print("Loading WebAssembly...\n");
 
diff --git a/platforms/hifive1/src/main.c b/platforms/hifive1/src/main.c
index be2dcbc..68a6171 100644
--- a/platforms/hifive1/src/main.c
+++ b/platforms/hifive1/src/main.c
@@ -19,7 +19,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    uint32_t fsize = fib32_wasm_len-1;
+    uint32_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
     IM3Environment env = m3_NewEnvironment ();
diff --git a/platforms/ios/wasm3/main.c b/platforms/ios/wasm3/main.c
index d9f0efa..a0c5e62 100644
--- a/platforms/ios/wasm3/main.c
+++ b/platforms/ios/wasm3/main.c
@@ -55,7 +55,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    uint32_t fsize = fib32_wasm_len - 1;
+    uint32_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
 
diff --git a/platforms/particle/src/main.ino b/platforms/particle/src/main.ino
index 199d656..1bd8079 100644
--- a/platforms/particle/src/main.ino
+++ b/platforms/particle/src/main.ino
@@ -24,7 +24,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    size_t fsize = fib32_wasm_len-1;
+    size_t fsize = fib32_wasm_len;
 
     Serial.println("Loading WebAssembly...");
 
diff --git a/platforms/wm_w600/Makefile b/platforms/wm_w600/Makefile
index 581df15..aa6bf31 100644
--- a/platforms/wm_w600/Makefile
+++ b/platforms/wm_w600/Makefile
@@ -90,7 +90,7 @@ endif
 #   for a subtree within the makefile rooted therein
 #
 
-DEFINES = -DWM_W600 -Os -flto
+DEFINES = -DWM_W600 -Os -flto -Wfatal-errors
 #			-Dd_m3FixedHeap=8192
 #			-fno-optimize-sibling-calls
 
diff --git a/platforms/wm_w600/main.c b/platforms/wm_w600/main.c
index 1b7a570..e397432 100644
--- a/platforms/wm_w600/main.c
+++ b/platforms/wm_w600/main.c
@@ -8,7 +8,7 @@
 #include "wm_include.h"
 
 #include "m3/wasm3.h"
-#include "m3/m3_env.h"
+//#include "m3/m3_env.h"
 
 #include "m3/extra/fib32.wasm.h"
 
@@ -24,7 +24,7 @@ void run_wasm()
     M3Result result = m3Err_none;
 
     uint8_t* wasm = (uint8_t*)fib32_wasm;
-    uint32_t fsize = fib32_wasm_len-1;
+    uint32_t fsize = fib32_wasm_len;
 
     printf("Loading WebAssembly...\n");
     IM3Environment env = m3_NewEnvironment ();
@@ -51,8 +51,8 @@ void run_wasm()
 
     if (result) FATAL("m3_CallWithArgs: %s", result);
 
-    long value = *(uint64_t*)(runtime->stack);
-    printf("Result: %ld\n", value);
+    //long value = *(uint64_t*)(runtime->stack);
+    //printf("Result: %ld\n", value);
 }