diff --git a/src/add-ons/translators/bmptranslator/BMPTranslator.cpp b/src/add-ons/translators/bmptranslator/BMPTranslator.cpp
index 8138d7ccf3..7f18da7850 100644
--- a/src/add-ons/translators/bmptranslator/BMPTranslator.cpp
+++ b/src/add-ons/translators/bmptranslator/BMPTranslator.cpp
@@ -222,10 +222,12 @@ BMPTranslator::TranslatorVersion() const
 const translation_format *
 BMPTranslator::InputFormats(int32 *out_count) const
 {
-	if (out_count)
-		*out_count = 2;
-
-	return gInputFormats;
+	if (out_count) {
+		*out_count = sizeof(gInputFormats) /
+			sizeof(translation_format);
+		return gInputFormats;
+	} else
+		return NULL;
 }
 
 // ---------------------------------------------------------------
@@ -246,10 +248,12 @@ BMPTranslator::InputFormats(int32 *out_count) const
 const translation_format *
 BMPTranslator::OutputFormats(int32 *out_count) const
 {
-	if (out_count)
-		*out_count = 2;
-
-	return gOutputFormats;
+	if (out_count) {
+		*out_count = sizeof(gOutputFormats) /
+			sizeof(translation_format);
+		return gOutputFormats;
+	} else
+		return NULL;
 }
 
 // ---------------------------------------------------------------