diff --git a/Core/HLE/HLE.cpp b/Core/HLE/HLE.cpp
index 758d5abf24d2..13d5961bcd78 100644
--- a/Core/HLE/HLE.cpp
+++ b/Core/HLE/HLE.cpp
@@ -435,18 +435,24 @@ inline void updateSyscallStats(int modulenum, int funcnum, double total)
 inline void CallSyscallWithFlags(const HLEFunction *info)
 {
 	const u32 flags = info->flags;
-	if ((flags & HLE_NOT_DISPATCH_SUSPENDED) && !__KernelIsDispatchEnabled())
-	{
+
+	if (flags & HLE_CLEAR_STACK_BYTES) {
+		u32 stackStart = __KernelGetCurThreadStackStart();
+		if (currentMIPS->r[MIPS_REG_SP] - info->stackBytesToClear >= stackStart) {
+			Memory::Memset(currentMIPS->r[MIPS_REG_SP] - info->stackBytesToClear, 0, info->stackBytesToClear);
+		}
+	}
+
+	if ((flags & HLE_NOT_DISPATCH_SUSPENDED) && !__KernelIsDispatchEnabled()) {
 		DEBUG_LOG(HLE, "%s: dispatch suspended", info->name);
 		RETURN(SCE_KERNEL_ERROR_CAN_NOT_WAIT);
 	}
-	else if ((flags & HLE_NOT_IN_INTERRUPT) && __IsInInterrupt())
-	{
+	else if ((flags & HLE_NOT_IN_INTERRUPT) && __IsInInterrupt()) {
 		DEBUG_LOG(HLE, "%s: in interrupt", info->name);
 		RETURN(SCE_KERNEL_ERROR_ILLEGAL_CONTEXT);
-	}
-	else
+	} else {
 		info->func();
+	}
 
 	if (hleAfterSyscall != HLE_AFTER_NOTHING)
 		hleFinishSyscall(*info);
@@ -516,6 +522,7 @@ void CallSyscall(MIPSOpcode op)
 		time_update();
 		start = time_now_d();
 	}
+
 	const HLEFunction *info = GetSyscallInfo(op);
 	if (!info) {
 		RETURN(SCE_KERNEL_ERROR_LIBRARY_NOT_YET_LINKED);
diff --git a/Core/HLE/HLE.h b/Core/HLE/HLE.h
index d57659e742bc..46eb3dfd832e 100644
--- a/Core/HLE/HLE.h
+++ b/Core/HLE/HLE.h
@@ -32,6 +32,7 @@ enum {
 	HLE_NOT_IN_INTERRUPT = 1 << 8,
 	// Don't allow the call if dispatch or interrupts are disabled.
 	HLE_NOT_DISPATCH_SUSPENDED = 1 << 9,
+	HLE_CLEAR_STACK_BYTES = 1 << 10
 };
 
 struct HLEFunction
@@ -40,6 +41,7 @@ struct HLEFunction
 	HLEFunc func;
 	const char *name;
 	u32 flags;
+	u32 stackBytesToClear;
 };
 
 struct HLEModule
diff --git a/Core/HLE/sceFont.cpp b/Core/HLE/sceFont.cpp
index be1a77d4a8b6..b22f741b28d1 100644
--- a/Core/HLE/sceFont.cpp
+++ b/Core/HLE/sceFont.cpp
@@ -1355,7 +1355,7 @@ static int sceFontGetShadowGlyphImage_Clip(u32 fontHandle, u32 charCode, u32 gly
 }
 
 const HLEFunction sceLibFont[] = {
-	{0x67f17ed7, WrapU_UU<sceFontNewLib>, "sceFontNewLib"},
+	{0x67f17ed7, WrapU_UU<sceFontNewLib>, "sceFontNewLib", HLE_CLEAR_STACK_BYTES, 0x590},
 	{0x574b6fbc, WrapI_U<sceFontDoneLib>, "sceFontDoneLib"},
 	{0x48293280, WrapI_UFF<sceFontSetResolution>, "sceFontSetResolution"},
 	{0x27f6e642, WrapI_UU<sceFontGetNumFontList>, "sceFontGetNumFontList"},
@@ -1366,14 +1366,14 @@ const HLEFunction sceLibFont[] = {
 	{0x5333322d, WrapI_UUU<sceFontGetFontInfoByIndexNumber>, "sceFontGetFontInfoByIndexNumber"},
 	{0xa834319d, WrapU_UUUU<sceFontOpen>, "sceFontOpen"},
 	{0x57fcb733, WrapU_UCUU<sceFontOpenUserFile>, "sceFontOpenUserFile"},
-	{0xbb8e7fe6, WrapU_UUUU<sceFontOpenUserMemory>, "sceFontOpenUserMemory"},
+	{0xbb8e7fe6, WrapU_UUUU<sceFontOpenUserMemory>, "sceFontOpenUserMemory", HLE_CLEAR_STACK_BYTES, 0x440},
 	{0x3aea8cb6, WrapI_U<sceFontClose>, "sceFontClose"},
 	{0x0da7535e, WrapI_UU<sceFontGetFontInfo>, "sceFontGetFontInfo"},
-	{0xdcc80c2f, WrapI_UUU<sceFontGetCharInfo>, "sceFontGetCharInfo"},
+	{0xdcc80c2f, WrapI_UUU<sceFontGetCharInfo>, "sceFontGetCharInfo", HLE_CLEAR_STACK_BYTES, 0x100},
 	{0xaa3de7b5, WrapI_UUU<sceFontGetShadowInfo>, "sceFontGetShadowInfo"},
 	{0x5c3e4a9e, WrapI_UUU<sceFontGetCharImageRect>, "sceFontGetCharImageRect"},
 	{0x48b06520, WrapI_UUU<sceFontGetShadowImageRect>, "sceFontGetShadowImageRect"},
-	{0x980f4895, WrapI_UUU<sceFontGetCharGlyphImage>, "sceFontGetCharGlyphImage"},
+	{0x980f4895, WrapI_UUU<sceFontGetCharGlyphImage>, "sceFontGetCharGlyphImage", HLE_CLEAR_STACK_BYTES, 0x120},
 	{0xca1e6945, WrapI_UUUIIII<sceFontGetCharGlyphImage_Clip>, "sceFontGetCharGlyphImage_Clip"},
 	{0x74b21701, WrapF_IFU<sceFontPixelToPointH>, "sceFontPixelToPointH"},
 	{0xf8f0752e, WrapF_IFU<sceFontPixelToPointV>, "sceFontPixelToPointV"},
diff --git a/Core/HLE/sceKernelThread.cpp b/Core/HLE/sceKernelThread.cpp
index e7675c28c091..678f4f12ab36 100644
--- a/Core/HLE/sceKernelThread.cpp
+++ b/Core/HLE/sceKernelThread.cpp
@@ -2538,6 +2538,14 @@ u32 __KernelGetCurThreadStack()
 	return 0;
 }
 
+u32 __KernelGetCurThreadStackStart()
+{
+	Thread *t = __GetCurrentThread();
+	if (t)
+		return t->currentStack.start;
+	return 0;
+}
+
 SceUID sceKernelGetThreadId()
 {
 	VERBOSE_LOG(SCEKERNEL, "%i = sceKernelGetThreadId()", currentThread);
diff --git a/Core/HLE/sceKernelThread.h b/Core/HLE/sceKernelThread.h
index a9e688a1e372..8376de43a72f 100644
--- a/Core/HLE/sceKernelThread.h
+++ b/Core/HLE/sceKernelThread.h
@@ -159,6 +159,7 @@ KernelObject *__KernelCallbackObject();
 void __KernelScheduleWakeup(int threadnumber, s64 usFromNow);
 SceUID __KernelGetCurThread();
 u32 __KernelGetCurThreadStack();
+u32 __KernelGetCurThreadStackStart();
 const char *__KernelGetThreadName(SceUID threadID);
 
 void __KernelSaveContext(ThreadContext *ctx, bool vfpuEnabled);