diff --git a/build.cmd b/build.cmd
index d72b240..578afa9 100644
--- a/build.cmd
+++ b/build.cmd
@@ -15,7 +15,7 @@ if "%1" == "debug" (
     set CL=/MT /Od /Zi /RTC1 /Fdprogmgr.pdb /fsanitize=address /DUNICODE /DPROGMGR_GIT_HASH="%GIT_HASH%"
     set LINK=/DEBUG
 ) else (
-    set CL=/O1 /GS- /DUNICODE /DNDEBUG /DPROGMGR_NO_CRT /DPROGMGR_GIT_HASH="%GIT_HASH%"
+    set CL=/O1 /GS- /DUNICODE /DNDEBUG /DPROGMGR_GIT_HASH="%GIT_HASH%"
     set LINK=/NODEFAULTLIB /OPT:REF /OPT:ICF
 )
 
diff --git a/progmgr/progmgr.c b/progmgr/progmgr.c
index 705fac9..3eacc33 100644
--- a/progmgr/progmgr.c
+++ b/progmgr/progmgr.c
@@ -166,7 +166,11 @@ int WINAPI wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance,
 	return 0;
 }
 
-#ifdef PROGMGR_NO_CRT
+// NOTE(u130b8): We're compiling without the C runtime by default in Release builds.
+// But in Debug builds, we need the C runtime, otherwise the address sanitizer and
+// MSVC debug tools break because they use the wWinMainCRTStartup entrypoint to initialize.
+
+#ifdef NDEBUG
 #pragma function(memset)
 void *memset(char* dst, int value, size_t count) {
     while (count--) { *dst++ = value; }