diff --git a/core/mem/virtual/virtual_darwin.odin b/core/mem/virtual/virtual_darwin.odin
index 5505149b0..bd1336cba 100644
--- a/core/mem/virtual/virtual_darwin.odin
+++ b/core/mem/virtual/virtual_darwin.odin
@@ -136,7 +136,7 @@ _protect :: proc "contextless" (data: rawptr, size: uint, flags: Protect_Flags)
 	if .Write   in flags { pflags |= PROT_WRITE }
 	if .Execute in flags { pflags |= PROT_EXEC  }
 	err := _mprotect(data, size, pflags)
-	return err != 0
+	return err == 0
 }
 
 
diff --git a/core/mem/virtual/virtual_linux.odin b/core/mem/virtual/virtual_linux.odin
index 7ffc7643e..b927f2877 100644
--- a/core/mem/virtual/virtual_linux.odin
+++ b/core/mem/virtual/virtual_linux.odin
@@ -40,7 +40,7 @@ _protect :: proc "contextless" (data: rawptr, size: uint, flags: Protect_Flags)
 	if .Write   in flags { pflags |= {.WRITE} }
 	if .Execute in flags { pflags |= {.EXEC}  }
 	errno := linux.mprotect(data, size, pflags)
-	return errno != .NONE
+	return errno == .NONE
 }
 
 _platform_memory_init :: proc() {