diff --git a/dtool/src/prc/CMakeLists.txt b/dtool/src/prc/CMakeLists.txt
index 3d478ede3a..0c6641ecee 100644
--- a/dtool/src/prc/CMakeLists.txt
+++ b/dtool/src/prc/CMakeLists.txt
@@ -72,6 +72,7 @@ composite_sources(p3prc P3PRC_SOURCES)
 
 add_component_library(p3prc SYMBOL BUILDING_DTOOL_PRC
   ${P3PRC_HEADERS} ${P3PRC_SOURCES})
+target_include_directories(p3prc PUBLIC ${CMAKE_CURRENT_BINARY_DIR})
 # The extensions need py_panda.h and extension.h from interrogatedb
 target_include_directories(p3prc PUBLIC
   $<TARGET_PROPERTY:p3interrogatedb,INTERFACE_INCLUDE_DIRECTORIES>)