diff --git a/packages/wasm-utils/fpmake.pp b/packages/wasm-utils/fpmake.pp
index 0666afaa50..e09615d852 100644
--- a/packages/wasm-utils/fpmake.pp
+++ b/packages/wasm-utils/fpmake.pp
@@ -27,6 +27,8 @@ begin
     P.SourcePath.Add('src');
     // Logger
     T:=P.Targets.AddUnit('wasm.logger.api.pas');
+    // Memutils
+    T:=P.Targets.AddUnit('wasm.memutils.pas');
     
     // Timer
     T:=P.Targets.AddUnit('wasm.timer.shared.pas');
diff --git a/rtl/wasicommon/sysheap.inc b/rtl/wasicommon/sysheap.inc
index b76edc67ce..c45c1395a2 100644
--- a/rtl/wasicommon/sysheap.inc
+++ b/rtl/wasicommon/sysheap.inc
@@ -71,6 +71,8 @@ begin
         end
       else
         SysOSAlloc:=nil;
+      if assigned(WasmGrowMemoryCallback) then
+        WasmGrowMemoryCallback(grow_pages);
     end;
 {$ifdef FPC_WASM_THREADS}
   if InitialHeapCriticalSectionInitialized then
diff --git a/rtl/wasicommon/system.pp b/rtl/wasicommon/system.pp
index 15604af216..2ad5bacf40 100644
--- a/rtl/wasicommon/system.pp
+++ b/rtl/wasicommon/system.pp
@@ -66,17 +66,23 @@ const
   sLineBreak = LineEnding;
   DefaultTextLineBreakStyle : TTextLineBreakStyle = tlbsLF;
 
+type
+  TWasmGrowMemoryCallBack = procedure(aGrowPages: longint);
+
 var
   argc: longint;
   argv: PPAnsiChar;
   envp: PPAnsiChar;
   ___fpc_wasm_suspender: WasmExternRef; section 'WebAssembly.Global';
-
+  WasmGrowMemoryCallback : TWasmGrowMemoryCallBack;
+  
 function __fpc_get_wasm_suspender: WasmExternRef;
 procedure __fpc_set_wasm_suspender(v: WasmExternRef);
 
 property __fpc_wasm_suspender: WasmExternRef read __fpc_get_wasm_suspender write __fpc_set_wasm_suspender;
 
+
+
 Procedure DebugWriteln(aString : ShortString);
 
 implementation