diff --git a/source/backend/llvm/linker.cpp b/source/backend/llvm/linker.cpp
index c182bf42..87b29938 100644
--- a/source/backend/llvm/linker.cpp
+++ b/source/backend/llvm/linker.cpp
@@ -211,7 +211,9 @@ namespace backend
 
 		if(frontend::getOutputMode() == ProgOutputMode::RunJit)
 		{
-			const char* argv = ("llvm-jit-" + this->linkedModule->getModuleIdentifier()).c_str();
+			std::string modname = ("llvm-jit-" + this->linkedModule->getModuleIdentifier());
+			const char* argv = modname.c_str();
+
 			auto entry = this->getEntryFunctionFromJIT();
 
 			_printTiming(ts, "llvm jit");
diff --git a/source/backend/llvm/translator.cpp b/source/backend/llvm/translator.cpp
index 9e91e805..fd7e0b2b 100644
--- a/source/backend/llvm/translator.cpp
+++ b/source/backend/llvm/translator.cpp
@@ -489,7 +489,7 @@ namespace backend
 				ty = fir::Type::getString();
 
 				// add -1 for the capacity and 0 for the refcountptr.
-				mems.push_back(llvm::ConstantInt::get(getNativeWordTy(), -1));
+				mems.push_back(llvm::ConstantInt::get(getNativeWordTy(), static_cast<uint64_t>(-1)));
 				mems.push_back(zconst);
 			}
 
diff --git a/source/include/zpr.h b/source/include/zpr.h
index 5dbd81c7..5b362c07 100644
--- a/source/include/zpr.h
+++ b/source/include/zpr.h
@@ -9,6 +9,7 @@
 
 #include <map>
 #include <string>
+#include <algorithm>
 #include <type_traits>
 #include <string_view>
 
@@ -404,7 +405,6 @@ namespace zpr
 				char buf[65] = {0};
 
 				size_t digits_len = 0;
-				const char* fmt_str = 0;
 				auto spec = args.specifier;
 
 				static std::map<int64_t, std::string> len_specs = {
@@ -417,8 +417,9 @@ namespace zpr
 					{ format_args::LENGTH_PTRDIFF_T,    "t"    }
 				};
 
-				fmt_str = ("%" + len_specs[args.length] + spec).c_str();
-				digits_len = snprintf(&buf[0], 64, fmt_str, x);
+				auto fmt_str = ("%" + len_specs[args.length] + spec);
+
+				digits_len = snprintf(&buf[0], 64, fmt_str.c_str(), x);
 
 				// sadly, we must cheat here as well, because osx doesn't bloody have charconv (STILL)?