diff --git a/druntime/src/core/sys/windows/imagehlp.d b/druntime/src/core/sys/windows/imagehlp.d
index 0c900a694785..a5ab5952a00f 100644
--- a/druntime/src/core/sys/windows/imagehlp.d
+++ b/druntime/src/core/sys/windows/imagehlp.d
@@ -278,6 +278,7 @@ alias PIMAGEHLP_DUPLICATE_SYMBOL = IMAGEHLP_DUPLICATE_SYMBOL*;
 alias DIGEST_HANDLE = HANDLE;
 
 extern (Windows) {
+nothrow @nogc:
     alias PIMAGEHLP_STATUS_ROUTINE = BOOL function(IMAGEHLP_STATUS_REASON, LPSTR, LPSTR, ULONG_PTR, ULONG_PTR);
     alias PREAD_PROCESS_MEMORY_ROUTINE = BOOL function(HANDLE , LPCVOID, LPVOID, DWORD, LPDWORD);
     alias PFUNCTION_TABLE_ACCESS_ROUTINE = LPVOID function(HANDLE, DWORD);
@@ -289,7 +290,6 @@ extern (Windows) {
     alias PSYMBOL_REGISTERED_CALLBACK = BOOL function(HANDLE, ULONG, PVOID, PVOID);
     alias DIGEST_FUNCTION = BOOL function(DIGEST_HANDLE refdata, PBYTE pData, DWORD dwLength);
 
-nothrow @nogc:
     PIMAGE_NT_HEADERS CheckSumMappedFile(LPVOID, DWORD, LPDWORD, LPDWORD);
     DWORD MapFileAndCheckSumA(LPSTR, LPDWORD, LPDWORD);
     DWORD MapFileAndCheckSumW(PWSTR, LPDWORD, LPDWORD);