diff --git a/src/add-ons/translators/psd/PSDLoader.cpp b/src/add-ons/translators/psd/PSDLoader.cpp
index 439f439db6..03eda0789b 100644
--- a/src/add-ons/translators/psd/PSDLoader.cpp
+++ b/src/add-ons/translators/psd/PSDLoader.cpp
@@ -524,7 +524,7 @@ PSDLoader::_ParseImageResources(void)
 	if (!fLoaded && fImageResourceSectionSize == 0)
 		return B_ERROR;
 
-	size_t currentPos = fStream->Position();
+	off_t currentPos = fStream->Position();
 	fStream->Seek(fImageResourceSectionPos, SEEK_SET);
 	
 	while (fStream->Position() < currentPos + fImageResourceSectionSize) {
diff --git a/src/add-ons/translators/psd/PSDLoader.h b/src/add-ons/translators/psd/PSDLoader.h
index dca0ed49f6..5e4b384bce 100644
--- a/src/add-ons/translators/psd/PSDLoader.h
+++ b/src/add-ons/translators/psd/PSDLoader.h
@@ -97,8 +97,8 @@ private:
 	size_t			fColorModeDataSize;
 	size_t			fColorModeDataPos;
 	
-	size_t			fImageResourceSectionSize;
-	size_t			fImageResourceSectionPos;
+	off_t			fImageResourceSectionSize;
+	off_t			fImageResourceSectionPos;
 	
 	int32 			fSignature;
 	int16 			fVersion;