diff --git a/Source/JavaScriptCore/heap/MachineStackMarker.cpp b/Source/JavaScriptCore/heap/MachineStackMarker.cpp
index 883914fd3d1ae..fcd3e57261b75 100644
--- a/Source/JavaScriptCore/heap/MachineStackMarker.cpp
+++ b/Source/JavaScriptCore/heap/MachineStackMarker.cpp
@@ -665,9 +665,8 @@ void* MachineThreads::Thread::Registers::framePointer() const
 #error Unknown Architecture
 #endif
 
-#elif defined(__GLIBC__)
+#elif OS(LINUX)
 
-// The following sequence depends on glibc's sys/ucontext.h.
 #if CPU(X86)
     return reinterpret_cast<void*>((uintptr_t) regs.machineContext.gregs[REG_EBP]);
 #elif CPU(X86_64)
@@ -747,9 +746,8 @@ void* MachineThreads::Thread::Registers::instructionPointer() const
 #error Unknown Architecture
 #endif
 
-#elif defined(__GLIBC__)
+#elif OS(LINUX)
 
-// The following sequence depends on glibc's sys/ucontext.h.
 #if CPU(X86)
     return reinterpret_cast<void*>((uintptr_t) regs.machineContext.gregs[REG_EIP]);
 #elif CPU(X86_64)
@@ -838,9 +836,8 @@ void* MachineThreads::Thread::Registers::llintPC() const
 #error Unknown Architecture
 #endif
 
-#elif defined(__GLIBC__)
+#elif OS(LINUX)
 
-// The following sequence depends on glibc's sys/ucontext.h.
 #if CPU(X86)
     return reinterpret_cast<void*>((uintptr_t) regs.machineContext.gregs[REG_ESI]);
 #elif CPU(X86_64)
diff --git a/Source/JavaScriptCore/inspector/JSGlobalObjectInspectorController.cpp b/Source/JavaScriptCore/inspector/JSGlobalObjectInspectorController.cpp
index fd7f869d4b789..31fc11ad0b915 100644
--- a/Source/JavaScriptCore/inspector/JSGlobalObjectInspectorController.cpp
+++ b/Source/JavaScriptCore/inspector/JSGlobalObjectInspectorController.cpp
@@ -49,7 +49,7 @@
 #include <wtf/Stopwatch.h>
 
 #include <cxxabi.h>
-#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK))
+#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK) && defined(__GLIBC__) && !defined(__UCLIBC__))
 #include <dlfcn.h>
 #include <execinfo.h>
 #endif
@@ -187,7 +187,7 @@ void JSGlobalObjectInspectorController::pause()
 
 void JSGlobalObjectInspectorController::appendAPIBacktrace(ScriptCallStack* callStack)
 {
-#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK))
+#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK) && defined(__GLIBC__) && !defined(__UCLIBC__))
     static const int framesToShow = 31;
     static const int framesToSkip = 3; // WTFGetBacktrace, appendAPIBacktrace, reportAPIException.