diff --git a/compiler-rt/lib/profile/InstrProfiling.c b/compiler-rt/lib/profile/InstrProfiling.c
index 24820ec6d836..1c1d85af9860 100644
--- a/compiler-rt/lib/profile/InstrProfiling.c
+++ b/compiler-rt/lib/profile/InstrProfiling.c
@@ -16,7 +16,7 @@
 #define INSTR_PROF_VALUE_PROF_DATA
 #include "InstrProfData.inc"
 
-char *(*GetEnvHook)(const char *) = 0;
+COMPILER_RT_VISIBILITY char *(*GetEnvHook)(const char *) = 0;
 
 COMPILER_RT_WEAK uint64_t __llvm_profile_raw_version = INSTR_PROF_RAW_VERSION;
 
diff --git a/compiler-rt/lib/profile/InstrProfilingInternal.h b/compiler-rt/lib/profile/InstrProfilingInternal.h
index 2645858fc090..e72bfee71f79 100644
--- a/compiler-rt/lib/profile/InstrProfilingInternal.h
+++ b/compiler-rt/lib/profile/InstrProfilingInternal.h
@@ -114,9 +114,9 @@ int lprofWriteDataImpl(WriterCallback Writer, void *WriterCtx,
 void lprofMergeValueProfData(struct ValueProfData *SrcValueProfData,
                              __llvm_profile_data *DstData);
 
-extern char *(*GetEnvHook)(const char *);
-extern void (*FreeHook)(void *);
-extern void *(*CallocHook)(size_t, size_t);
+COMPILER_RT_VISIBILITY extern char *(*GetEnvHook)(const char *);
+COMPILER_RT_VISIBILITY extern void (*FreeHook)(void *);
+COMPILER_RT_VISIBILITY extern void *(*CallocHook)(size_t, size_t);
 extern void (*VPMergeHook)(struct ValueProfData *, __llvm_profile_data *);
 extern uint32_t VPBufferSize;
 
diff --git a/compiler-rt/lib/profile/InstrProfilingWriter.c b/compiler-rt/lib/profile/InstrProfilingWriter.c
index 18b3f34640bd..9513931c63dc 100644
--- a/compiler-rt/lib/profile/InstrProfilingWriter.c
+++ b/compiler-rt/lib/profile/InstrProfilingWriter.c
@@ -13,8 +13,8 @@
 
 #define INSTR_PROF_VALUE_PROF_DATA
 #include "InstrProfData.inc"
-void (*FreeHook)(void *) = NULL;
-void* (*CallocHook)(size_t, size_t) = NULL;
+COMPILER_RT_VISIBILITY void (*FreeHook)(void *) = NULL;
+COMPILER_RT_VISIBILITY void *(*CallocHook)(size_t, size_t) = NULL;
 uint32_t VPBufferSize = 0;
 
 /* The buffer writer is reponsponsible in keeping writer state