diff --git a/type.go b/type.go
index beb5b3d..dc92aca 100644
--- a/type.go
+++ b/type.go
@@ -106,15 +106,15 @@ func IsImageTypeSupportedByVips(t ImageType) bool {
 	imageMutex.RLock()
 
 	// Discover supported image types and cache the result
-	itShouldDiscovery := len(SupportedImageTypes) == 0
-	if itShouldDiscovery {
+	itShouldDiscover := len(SupportedImageTypes) == 0
+	if itShouldDiscover {
 		imageMutex.RUnlock()
 		discoverSupportedImageTypes()
 	}
 
 	// Check if image type is actually supported
 	isSupported, ok := SupportedImageTypes[t]
-	if !itShouldDiscovery {
+	if !itShouldDiscover {
 		imageMutex.RUnlock()
 	}
 
diff --git a/vips.go b/vips.go
index 33ab442..a7d3b35 100644
--- a/vips.go
+++ b/vips.go
@@ -161,6 +161,9 @@ func VipsIsTypeSupported(t ImageType) bool {
 	if t == TIFF {
 		return int(C.vips_type_find_bridge(C.TIFF)) != 0
 	}
+	if t == MAGICK {
+		return int(C.vips_type_find_bridge(C.MAGICK)) != 0
+	}
 	return false
 }
 
@@ -512,7 +515,7 @@ func vipsImageType(buf []byte) ImageType {
 	if IsImageTypeSupportedByVips(SVG) && IsSVGImage(buf) {
 		return SVG
 	}
-	if strings.HasSuffix(readImageType(buf), "MagickBuffer") {
+	if IsImageTypeSupportedByVips(MAGICK) && strings.HasSuffix(readImageType(buf), "MagickBuffer") {
 		return MAGICK
 	}
 	return UNKNOWN