diff --git a/Core/HLE/sceFont.cpp b/Core/HLE/sceFont.cpp
index 4201f8bce9..f0fdea1eff 100644
--- a/Core/HLE/sceFont.cpp
+++ b/Core/HLE/sceFont.cpp
@@ -605,13 +605,18 @@ int sceFontDoneLib(u32 fontLibHandle) {
 
 // Open internal font into a FontLib
 u32 sceFontOpen(u32 libHandle, u32 index, u32 mode, u32 errorCodePtr) {
-	INFO_LOG(HLE, "sceFontOpen(%x, %x, %x, %x)", libHandle, index, mode, errorCodePtr);
 	if (!Memory::IsValidAddress(errorCodePtr)) {
-		Memory::Write_U32(ERROR_FONT_INVALID_PARAMETER, errorCodePtr);
+		// Would crash on the PSP.
+		ERROR_LOG(HLE, "sceFontOpen(%x, %x, %x, %x): invalid pointer", libHandle, index, mode, errorCodePtr);
 		return 0;
 	}
 
+	INFO_LOG(HLE, "sceFontOpen(%x, %x, %x, %x)", libHandle, index, mode, errorCodePtr);
 	FontLib *fontLib = GetFontLib(libHandle);
+	if (fontLib == NULL) {
+		Memory::Write_U32(ERROR_FONT_INVALID_LIBID, errorCodePtr);
+		return 0;
+	}
 	if (index >= internalFonts.size()) {
 		Memory::Write_U32(ERROR_FONT_INVALID_PARAMETER, errorCodePtr);
 		return 0;