diff --git a/modules/juce_core/time/juce_RelativeTime.cpp b/modules/juce_core/time/juce_RelativeTime.cpp
index 336e98d6d9..24e9b77f96 100644
--- a/modules/juce_core/time/juce_RelativeTime.cpp
+++ b/modules/juce_core/time/juce_RelativeTime.cpp
@@ -56,15 +56,15 @@ RelativeTime RelativeTime::operator-= (RelativeTime t) noexcept     { numSeconds
 RelativeTime RelativeTime::operator+= (const double secs) noexcept  { numSeconds += secs; return *this; }
 RelativeTime RelativeTime::operator-= (const double secs) noexcept  { numSeconds -= secs; return *this; }
 
-RelativeTime operator+ (RelativeTime t1, RelativeTime t2) noexcept  { return t1 += t2; }
-RelativeTime operator- (RelativeTime t1, RelativeTime t2) noexcept  { return t1 -= t2; }
+JUCE_API RelativeTime JUCE_CALLTYPE operator+ (RelativeTime t1, RelativeTime t2) noexcept  { return t1 += t2; }
+JUCE_API RelativeTime JUCE_CALLTYPE operator- (RelativeTime t1, RelativeTime t2) noexcept  { return t1 -= t2; }
 
-bool operator== (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() == t2.inSeconds(); }
-bool operator!= (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() != t2.inSeconds(); }
-bool operator>  (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() >  t2.inSeconds(); }
-bool operator<  (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() <  t2.inSeconds(); }
-bool operator>= (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() >= t2.inSeconds(); }
-bool operator<= (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() <= t2.inSeconds(); }
+JUCE_API bool JUCE_CALLTYPE operator== (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() == t2.inSeconds(); }
+JUCE_API bool JUCE_CALLTYPE operator!= (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() != t2.inSeconds(); }
+JUCE_API bool JUCE_CALLTYPE operator>  (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() >  t2.inSeconds(); }
+JUCE_API bool JUCE_CALLTYPE operator<  (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() <  t2.inSeconds(); }
+JUCE_API bool JUCE_CALLTYPE operator>= (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() >= t2.inSeconds(); }
+JUCE_API bool JUCE_CALLTYPE operator<= (RelativeTime t1, RelativeTime t2) noexcept       { return t1.inSeconds() <= t2.inSeconds(); }
 
 //==============================================================================
 static void translateTimeField (String& result, int n, const char* singular, const char* plural)
diff --git a/modules/juce_core/time/juce_RelativeTime.h b/modules/juce_core/time/juce_RelativeTime.h
index 2772e176e1..1f59a39b99 100644
--- a/modules/juce_core/time/juce_RelativeTime.h
+++ b/modules/juce_core/time/juce_RelativeTime.h
@@ -162,20 +162,20 @@ private:
 
 //==============================================================================
 /** Compares two RelativeTimes. */
-bool operator== (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API bool JUCE_CALLTYPE operator== (RelativeTime t1, RelativeTime t2) noexcept;
 /** Compares two RelativeTimes. */
-bool operator!= (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API bool JUCE_CALLTYPE operator!= (RelativeTime t1, RelativeTime t2) noexcept;
 /** Compares two RelativeTimes. */
-bool operator>  (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API bool JUCE_CALLTYPE operator>  (RelativeTime t1, RelativeTime t2) noexcept;
 /** Compares two RelativeTimes. */
-bool operator<  (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API bool JUCE_CALLTYPE operator<  (RelativeTime t1, RelativeTime t2) noexcept;
 /** Compares two RelativeTimes. */
-bool operator>= (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API bool JUCE_CALLTYPE operator>= (RelativeTime t1, RelativeTime t2) noexcept;
 /** Compares two RelativeTimes. */
-bool operator<= (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API bool JUCE_CALLTYPE operator<= (RelativeTime t1, RelativeTime t2) noexcept;
 
 //==============================================================================
 /** Adds two RelativeTimes together. */
-RelativeTime  operator+  (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API RelativeTime  JUCE_CALLTYPE operator+  (RelativeTime t1, RelativeTime t2) noexcept;
 /** Subtracts two RelativeTimes. */
-RelativeTime  operator-  (RelativeTime t1, RelativeTime t2) noexcept;
+JUCE_API RelativeTime  JUCE_CALLTYPE operator-  (RelativeTime t1, RelativeTime t2) noexcept;