diff --git a/panda/src/pipeline/contextSwitch.c b/panda/src/pipeline/contextSwitch.c
index ba9f3042b2..a46c43d651 100644
--- a/panda/src/pipeline/contextSwitch.c
+++ b/panda/src/pipeline/contextSwitch.c
@@ -19,7 +19,7 @@
 
 #ifdef THREAD_SIMPLE_IMPL
 
-#if defined(HAVE_UCONTEXT_H)
+#if defined(PHAVE_UCONTEXT_H)
 
 /* The getcontext() / setcontext() implementation.  Easy-peasy. */
 
diff --git a/panda/src/pipeline/contextSwitch.h b/panda/src/pipeline/contextSwitch.h
index bf446be187..ce64a67fd2 100644
--- a/panda/src/pipeline/contextSwitch.h
+++ b/panda/src/pipeline/contextSwitch.h
@@ -30,7 +30,7 @@
 
 #ifdef THREAD_SIMPLE_IMPL
 
-#if defined(HAVE_UCONTEXT_H)
+#if defined(PHAVE_UCONTEXT_H)
 /* We'd prefer to use getcontext() / setcontext() to portably change
    execution contexts within C code.  That's what these library
    functions are designed for. */