diff --git a/mfbt/Assertions.cpp b/mfbt/Assertions.cpp
index 0db03f42af66..cecf7985cda2 100644
--- a/mfbt/Assertions.cpp
+++ b/mfbt/Assertions.cpp
@@ -18,21 +18,6 @@ MOZ_BEGIN_EXTERN_C
  */
 MFBT_DATA const char* gMozCrashReason = nullptr;
 
-#ifndef DEBUG
-MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE void
-MOZ_CrashOOL(int aLine, const char* aReason)
-#else
-MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE void
-MOZ_CrashOOL(const char* aFilename, int aLine, const char* aReason)
-#endif
-{
-#ifdef DEBUG
-  MOZ_ReportCrash(aReason, aFilename, aLine);
-#endif
-  gMozCrashReason = aReason;
-  MOZ_REALLY_CRASH(aLine);
-}
-
 static char sPrintfCrashReason[sPrintfCrashReasonSize] = {};
 
 // Accesses to this atomic are not included in web replay recordings, so that
diff --git a/mfbt/Assertions.h b/mfbt/Assertions.h
index 6d7a7bcb2bb9..2855829cb005 100644
--- a/mfbt/Assertions.h
+++ b/mfbt/Assertions.h
@@ -301,15 +301,16 @@ MOZ_NoReturn(int aLine)
  * to crash-stats and are publicly visible. Firefox data stewards must do data
  * review on usages of this macro.
  */
-#ifndef DEBUG
-MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE void
-MOZ_CrashOOL(int aLine, const char* aReason);
-#  define MOZ_CRASH_UNSAFE_OOL(reason) MOZ_CrashOOL(__LINE__, reason)
-#else
-MFBT_API MOZ_COLD MOZ_NORETURN MOZ_NEVER_INLINE void
-MOZ_CrashOOL(const char* aFilename, int aLine, const char* aReason);
-#  define MOZ_CRASH_UNSAFE_OOL(reason) MOZ_CrashOOL(__FILE__, __LINE__, reason)
+static inline MOZ_COLD MOZ_NORETURN void
+MOZ_CrashOOL(const char* aFilename, int aLine, const char* aReason)
+{
+#ifdef DEBUG
+  MOZ_ReportCrash(aReason, aFilename, aLine);
 #endif
+  MOZ_CRASH_ANNOTATE(aReason);
+  MOZ_REALLY_CRASH(aLine);
+}
+#define MOZ_CRASH_UNSAFE_OOL(reason) MOZ_CrashOOL(__FILE__, __LINE__, reason)
 
 static const size_t sPrintfMaxArgs = 4;
 static const size_t sPrintfCrashReasonSize = 1024;