diff --git a/Core/Loaders.cpp b/Core/Loaders.cpp
index ba06d95d88..2fd57ae3af 100644
--- a/Core/Loaders.cpp
+++ b/Core/Loaders.cpp
@@ -15,6 +15,8 @@
 // Official git repository and contact information can be found at
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
+#include <algorithm>
+
 #include "Common/File/FileUtil.h"
 #include "Common/File/Path.h"
 #include "Common/StringUtils.h"
@@ -352,6 +354,34 @@ inline char asciitolower(char in) {
 	return in;
 }
 
+static bool ZipExtractFileToMemory(struct zip *z, int fileIndex, std::string *data) {
+	struct zip_stat zstat;
+	zip_stat_index(z, fileIndex, 0, &zstat);
+	if (zstat.size == 0) {
+		data->clear();
+		return true;
+	}
+
+	size_t readSize = zstat.size;
+	data->resize(readSize);
+
+	zip_file *zf = zip_fopen_index(z, fileIndex, 0);
+	if (!zf) {
+		ERROR_LOG(Log::HLE, "Failed to zip_fopen_index file %d from zip", fileIndex);
+		return false;
+	}
+
+	zip_int64_t retval = zip_fread(zf, data->data(), readSize);
+	zip_fclose(zf);
+
+	if (retval < 0 || retval < (int)readSize) {
+		ERROR_LOG(Log::HLE, "Failed to read %d bytes from zip (%d) - archive corrupt?", (int)readSize, (int)retval);
+		return false;
+	} else {
+		return true;
+	}
+}
+
 void DetectZipFileContents(struct zip *z, ZipFileInfo *info) {
 	int numFiles = zip_get_num_files(z);
 	_dbg_assert_(numFiles >= 0);
diff --git a/Core/Util/GameManager.cpp b/Core/Util/GameManager.cpp
index a0972e5f2b..a3cbf82314 100644
--- a/Core/Util/GameManager.cpp
+++ b/Core/Util/GameManager.cpp
@@ -473,34 +473,6 @@ std::string GameManager::GetISOGameID(FileLoader *loader) const {
 	return sfo.GetValueString("DISC_ID");
 }
 
-bool ZipExtractFileToMemory(struct zip *z, int fileIndex, std::string *data) {
-	struct zip_stat zstat;
-	zip_stat_index(z, fileIndex, 0, &zstat);
-	if (zstat.size == 0) {
-		data->clear();
-		return true;
-	}
-
-	size_t readSize = zstat.size;
-	data->resize(readSize);
-
-	zip_file *zf = zip_fopen_index(z, fileIndex, 0);
-	if (!zf) {
-		ERROR_LOG(Log::HLE, "Failed to zip_fopen_index file %d from zip", fileIndex);
-		return false;
-	}
-
-	zip_int64_t retval = zip_fread(zf, data->data(), readSize);
-	zip_fclose(zf);
-
-	if (retval < 0 || retval < (int)readSize) {
-		ERROR_LOG(Log::HLE, "Failed to read %d bytes from zip (%d) - archive corrupt?", (int)readSize, (int)retval);
-		return false;
-	} else {
-		return true;
-	}
-}
-
 bool GameManager::ExtractFile(struct zip *z, int file_index, const Path &outFilename, size_t *bytesCopied, size_t allBytes) {
 	struct zip_stat zstat;
 	zip_stat_index(z, file_index, 0, &zstat);
diff --git a/Core/Util/GameManager.h b/Core/Util/GameManager.h
index 30ebc72a27..7bbb315dc9 100644
--- a/Core/Util/GameManager.h
+++ b/Core/Util/GameManager.h
@@ -122,8 +122,4 @@ extern GameManager g_GameManager;
 struct zip *ZipOpenPath(Path fileName);
 void ZipClose(zip *z);
 
-void DetectZipFileContents(struct zip *z, ZipFileInfo *info);
-bool DetectZipFileContents(const Path &fileName, ZipFileInfo *info);
-
-bool ZipExtractFileToMemory(struct zip *z, int fileIndex, std::string *data);
 bool CanExtractWithoutOverwrite(struct zip *z, const Path &destination, int maxOkFiles);