diff --git a/rosapps/applications/devutils/symdump/symdump.c b/rosapps/applications/devutils/symdump/symdump.c
index ef28d14215d..22b1a0e4f0c 100644
--- a/rosapps/applications/devutils/symdump/symdump.c
+++ b/rosapps/applications/devutils/symdump/symdump.c
@@ -875,7 +875,7 @@ EnumSymbolsProc(
 		}
 		else
 		{
-		    printf("Symbol: %s, TypeIndex=%ld, Flags=%lx, Value=0x%llx\n",
+		    printf("Symbol: %s, TypeIndex=%ld, Flags=%lx, Value=0x%I64x\n",
 		        pSymInfo->Name, pSymInfo->TypeIndex, pSymInfo->Flags, pSymInfo->Value);
 			//if (pSymInfo->Flags & SYMFLAG_FUNCTION)
 			{
diff --git a/rosapps/applications/devutils/syscalldump/syscalldump.c b/rosapps/applications/devutils/syscalldump/syscalldump.c
index 149c63de474..bd160ff87e5 100644
--- a/rosapps/applications/devutils/syscalldump/syscalldump.c
+++ b/rosapps/applications/devutils/syscalldump/syscalldump.c
@@ -36,7 +36,7 @@ ImageSymToVa(HANDLE hProcess, PSYMBOL_INFO pSym, PBYTE pModule, PCSTR Name)
 		printf("SymGetSymFromName64() failed: %ld\n", GetLastError());
 		return 0;
 	}
-	printf("looking up adress for %s: 0x%llx\n", Name, pSym->Address);
+	printf("looking up adress for %s: 0x%I64x\n", Name, pSym->Address);
 
 	NtHeaders = ImageNtHeader(pModule);
 	p = ImageRvaToVa(NtHeaders, pModule, pSym->Address - pSym->ModBase, NULL);
diff --git a/rosapps/applications/sysutils/systeminfo/systeminfo.c b/rosapps/applications/sysutils/systeminfo/systeminfo.c
index d641c200da0..ea13782a28d 100644
--- a/rosapps/applications/sysutils/systeminfo/systeminfo.c
+++ b/rosapps/applications/sysutils/systeminfo/systeminfo.c
@@ -358,7 +358,8 @@ AllSysInfo(VOID)
 int
 main(int argc, char *argv[])
 {
-	if (argc > 1 && !strcmp(argv[1], "/?"))
+    char str[] = "/?";
+	if (argc > 1 && !strcmp(argv[1], str))
 	{
 		Usage();
 		return 0;